Outcome of acetaminophen overdose in pediatric patients and factors contributing to hepatotoxicity

Liver disease in adolescents

In this article, we discuss common liver diseases in the adolescent population. We describe the initial evaluation of an adolescent presenting with new-onset liver enzyme abnormalities, based on the clinical history and physical examination. The management approach to the adolescent with liver disease is exemplified, including monitoring for adherence, risk-taking behaviours and focusing on psychosocial aspects of their care. Finally, we highlight the challenges of caring for the adolescent patient and the importance of addressing not only the liver disease but, more importantly, the holistic approach towards their management.

Using a decision tree algorithm to distinguish between repeated supra-therapeutic and acute acetaminophen exposures

BACKGROUND

This study aimed to compare clinical and laboratory characteristics of supra-therapeutic (RSTI) and acute acetaminophen exposures using a predictive decision tree (DT) algorithm.

METHODS

We conducted a retrospective cohort study using the National Poison Data System (NPDS). All patients with RSTI acetaminophen exposure (n = 4,522) between January 2012 and December 2017 were included. Additionally, 4,522 randomly selected acute acetaminophen ingestion cases were included. After that, the DT machine learning algorithm was applied to differentiate acute acetaminophen exposure from supratherapeutic exposures.

RESULTS

The DT model had accuracy, precision, recall, and F1-scores of 0.75, respectively. Age was the most relevant variable in predicting the type of acetaminophen exposure, whether RSTI or acute. Serum aminotransferase concentrations, abdominal pain, drowsiness/lethargy, and nausea/vomiting were the other most important factors distinguishing between RST and acute acetaminophen exposure.

CONCLUSION

DT models can potentially aid in distinguishing between acute and RSTI of acetaminophen. Further validation is needed to assess the clinical utility of this model.

Mothers' ability to determine and measure paracetamol doses for children-a contrived observational study

Caregivers are primarily responsible for the administration of Over The Counter (OTC) medications in children. This study examines the mothers' ability to determine and measure paracetamol doses for children aged between 1 and 5 years. A contrived observational study was conducted for mothers of preschool aged children at two Public Health Midwifery (PHM) areas in Southern province, Sri Lanka. Stratified random sampling was used. Only 26.9% (n = 95, 95% CI = 22.5%-31.7%) of the 353 participants correctly determined and measured the doses of paracetamol. Errors were frequently made in both determining and measuring dose together (n = 113, 32.0%, 95% CI = 27.3%-37.1%), determining only (n = 94, 26.6%, 95% CI = 22.2%-31.5%) and measurement only (n = 51, 14.4%, 95% CI = 11.1%-18.5%). Dose determined errors were not significantly associated with maternal education, number of children in the family, total monthly income and age of the index child. Similarly measuring errors were not significantly associated with mothers' education, income of the family and number of children in the family. However, there was a weak positive correlation between measuring errors and age of the index child. The study suggests that mothers made errors when determining doses and measuring doses of paracetamol. Results emphasize importance of clear, concise guardian information leaflet and healthcare professionals' guidance to minimize dosing errors of child medication.

Repositioning Drugs for Rare Diseases Based on Biological Features and Computational Approaches

Rare diseases are a group of uncommon diseases in the world population. To date, about 7000 rare diseases have been documented. However, most of them do not have a known treatment. As a result of the relatively low demand for their treatments caused by their scarce prevalence, the pharmaceutical industry has not sufficiently encouraged the research to develop drugs to treat them. This work aims to analyse potential drug-repositioning strategies for this kind of disease. Drug repositioning seeks to find new uses for existing drugs. In this context, it seeks to discover if rare diseases could be treated with medicines previously indicated to heal other diseases. Our approaches tackle the problem by employing computational methods that calculate similarities between rare and non-rare diseases, considering biological features such as genes, proteins, and symptoms. Drug candidates for repositioning will be checked against clinical trials found in the scientific literature. In this study, 13 different rare diseases have been selected for which potential drugs could be repositioned. By verifying these drugs in the scientific literature, successful cases were found for 75% of the rare diseases studied. The genetic associations and phenotypical features of the rare diseases were examined. In addition, the verified drugs were classified according to the anatomical therapeutic chemical (ATC) code to highlight the types with a higher predisposition to be repositioned. These promising results open the door for further research in this field of study.

Acute Liver Failure in Children

Acute liver failure (ALF) in children, irrespective of cause, is a rapidly evolving catastrophic clinical condition that results in high mortality and morbidity without prompt identification and intervention. Massive hepatocyte necrosis impairs the synthetic, excretory, and detoxification abilities of the liver, with resultant coagulopathy, jaundice, metabolic disturbance, and encephalopathy. Extrahepatic organ damage, multiorgan failure, and death result from circulating inflammatory mediators released by the hepatocytes undergoing necrosis. There are yet no treatment options available for reversing or halting hepatocellular necrosis, thus current therapy focuses on supporting failing organs and preventing life threatening complications pending either spontaneous liver recovery or transplantation. The aims of this review are to define pediatric acute liver failure (PALF), understand the pathophysiologic processes that lead to multiorgan failure, to describe the consequences of a failing liver on extrahepatic organs, to enumerate the critical care challenges encountered during PALF management, and to describe pharmacologic and extracorporeal options available to support a critically ill child with ALF in the intensive care unit.

Potential for Further Mismanagement of Fever During COVID-19 Pandemic: Possible Causes and Impacts

Fever remains an integral part of acute infectious diseases management, especially for those without effective therapeutics, but the widespread myths about "fevers" and the presence of confusing guidelines from different agencies, which have heightened during the coronavirus disease 2019 (COVID-19) pandemic and are open to alternate interpretation, could deny whole populations the benefits of fever. Guidelines suggesting antipyresis for 37.8-39°C fever are concerning as 39°C boosts the protective heat-shock and immune response (humoral, cell-mediated, and nutritional) whereas ≥40°C initiates/enhances the antiviral responses and restricts high-temperature adapted pathogens, e.g., severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), strains of influenza, and measles. Urgent attention is accordingly needed to address the situation because of the potential public health consequences of the existence of conflicting guidelines in the public domain. We have in this article attempted to restate the benefits of fever in disease resolution, dispel myths, and underline the need for alignment of national treatment guidelines with that of the WHO, to promote appropriate practices and reduce the morbidity and mortality from infectious diseases, such as COVID-19.

Knowledge, beliefs and management of childhood fever among nurses and other health professionals: A cross-sectional survey

BACKGROUND

Fever phobia, the unfounded fear regarding the potential harms of fever in children, has been internationally documented among parents. This fear causes anxiety in parents and health professionals are regularly consulted for advice.

OBJECTIVES

This study aimed to investigate the knowledge, beliefs and recommended treatments among Australian nurses, pharmacists, general practitioners and paediatricians in the management of febrile children.

DESIGN, SETTING AND PARTICIPANTS

This was an online cross-sectional survey of Australian nurses, pharmacists, general practitioners and paediatricians designed to evaluate the knowledge and preferred recommendations in the management of febrile children.

METHODS

The health professionals were recruited via Facebook. Demographic information, knowledge, beliefs and preferred treatments were collected through the online survey, and responses were compared across professions.

RESULTS

Of the 839 health professionals who completed the survey, 52.0% correctly identified a fever as 38 °C or above. Overall, 23.6% underestimated the temperature that constitutes a fever. Respondents reported concerns leaving fever untreated in children, with dehydration (65.1%), seizures (65.2%), serious illness (34.4%) and brain damage (29.9%) the most common concerns. Pharmacists were more likely to hold these concerns. The beliefs that reducing a child's fever with medication will reduce the risk of harm (34.7%) and prevent febrile convulsions (51.1%) were prevalent among respondents. These beliefs were more common among pharmacists. Pharmacists were also more likely to recommend parents monitor a child's temperature (48.5%) and give medication to reduce fever (64.6%).

CONCLUSIONS

Australian nurses, pharmacists, general practitioners and paediatricians reported many misconceptions surrounding the definition of fever, the potential harms of fever and its management, which may perpetuate parental fears. These misconceptions were most common among pharmacists. Continuing professional development is essential to ease unfounded concerns and ensure the safe and judicious care of febrile children.

Liver disease in the older child

Liver disease in children tends to present either as: (i) an acute hepatitis with or without jaundice; (ii) incidental finding of abnormal liver function tests; or (iii) from a complication of portal hypertension with either haematemesis and/or incidental splenomegaly. Acute hepatitis may result from acute infection, prescribed or other drugs, ischaemia or vascular causes, autoimmune hepatitis, or idiopathic liver failure. Non-alcoholic fatty liver disease is now the most likely reason for abnormal liver function tests but medications, metabolic disease, cholangiopathy and non-liver causes should be considered. Autoimmune hepatitis and alpha-1-antitrypsin deficiency are the most likely causes of insidious liver disease. An international normalised ratio uncorrected by vitamin K reflects the severity of liver synthetic dysfunction, but not propensity to bleed. Creatine kinase helps to differentiate muscle from liver disease in patients with raised transaminases. Doppler ultrasound of hepatic vasculature is useful when assessing splenomegaly to differentiate extra-hepatic portal hypertension from inherent liver disease.

Enteral Acetaminophen Bioavailability in Pediatric Intensive Care Patients Determined With an Oral Microtracer and Pharmacokinetic Modeling to Optimize Dosing

OBJECTIVES

Decreasing morbidity and mortality by rationalizing drug treatment in the critically ill is of paramount importance but challenging as the underlying clinical condition may lead to large variation in drug disposition and response. New microtracer methodology is now available to gain knowledge on drug disposition in the intensive care. On the basis of studies in healthy adults, physicians tend to assume that oral doses of acetaminophen will be completely absorbed and therefore prescribe the same dose per kilogram for oral and IV administration. As the oral bioavailability of acetaminophen in critically ill children is unknown, we designed a microtracer study to shed a light on this issue.

DESIGN

An innovative microtracer study design with population pharmacokinetics.

SETTING

A tertiary referral PICU.

PATIENTS

Stable critically ill children, 0-6 years old, and already receiving IV acetaminophen.

INTERVENTIONS

Concomitant administration of an oral C radiolabeled acetaminophen microtracer (3 ng/kg) with IV acetaminophen treatment (15 mg/kg every 6 hr).

MEASUREMENTS

Blood was drawn from an indwelling arterial or central venous catheter up to 24 hours after C acetaminophen microtracer administration. Acetaminophen concentrations were measured by liquid chromatography-mass spectrometry and C concentrations by accelerated mass spectrometry.

MAIN RESULTS

In 47 patients (median age of 6.1 mo; Q1-Q3, 1.8-20 mo) the mean enteral bioavailability was 72% (range, 11-91%). With a standard dose (15 mg/kg 4 times daily), therapeutic steady-state concentrations were 2.5 times more likely to be reached with IV than with oral administration.

CONCLUSIONS

Microtracer studies present a new opportunity to gain knowledge on drug disposition in the intensive care. Using this modality in children in the pediatric intensive care, we showed that enteral administration of acetaminophen results in less predictable exposure and higher likelihood of subtherapeutic blood concentration than does IV administration. IV dosing may be preferable to ensure adequate pain relief.

Fatal acetaminophen poisoning with hepatic microvesicular steatosis in a child after repeated administration of therapeutic doses

Acetaminophen is the leading cause of acute liver failure worldwide following massive ingestion. We present here a fatal acute liver failure after repeated administration of four therapeutic doses of acetaminophen at 4-h intervals in a previously healthy 9-year-old female who presented dental pain after a facial trauma during sport practice. A diagnosis of paracetamol-induced hepatitis was deduced from the clinical picture of fulminant hepatitis and tubular necrosis, the encephalopathy with oedema and without signs of trauma. Liver biopsy showed typical acetaminophen-induced necrosis and a microvesicular steatosis in periportal hepatocytes. These injuries might have been favored by pre-existing mitochondrial dysfunction related, for instance, to a deficiency in an enzyme of the mitochondrial β-oxidation pathway, or the respiratory chain. The observation of microvesicular steatosis in the periportal areas suggests an increased vulnerability via pre-existing mitochondrial dysfunction. As the liver status of patients is mostly unknown, the frequency of administration (every six hours) must be respected and the use of pharmaceutical forms allowing to adjust the dose as closely as possible to the child's weight should be promoted.

Accuracy of Parent Perception of Comprehension of Discharge Instructions: Role of Plan Complexity and Health Literacy

OBJECTIVE

Inpatient discharge education is often suboptimal. Measures of parents' perceived comprehension of discharge instructions are included in national metrics given linkage to morbidity; few studies compare parents' perceived and actual comprehension. We 1) compared parent perceived and actual comprehension of discharge instructions and 2) assessed associations between plan complexity and parent health literacy with overestimation of comprehension (perceive comprehension but lack actual comprehension).

METHODS

Prospective cohort study of English/Spanish-speaking parents (n = 192) of inpatients ≤12 years old and discharged on ≥1 daily medication from an urban public hospital. We used McNemar's tests to compare parent perceived (agree/strongly agree on 5-point Likert scale) and actual comprehension (concordance of parent report with medical record) of instructions (domains: medications, appointments, return precautions, and restrictions). Generalized estimating equations were performed to assess associations between low parent health literacy (Newest Vital Sign score ≤3) and plan complexity with overestimation of comprehension.

RESULTS

Medication side effects were the domain with lowest perceived comprehension (80%), while >95% of parents perceived comprehension for other domains. Actual comprehension varied by domain (41%-87%) and was lower than perceived comprehension. Most (84%) parents overestimated comprehension in ≥1 domain. Plan complexity (adjusted odds ratio 3.6; 95% confidence interval 2.9-4.7) and low health literacy (adjusted odds ratio 1.9; 1.3-2.6) were associated with overestimation of comprehension.

CONCLUSIONS

Parental perceived comprehension of discharge instructions overestimated actual comprehension in most domains. Plan complexity and low health literacy were associated with overestimation of comprehension. Future interventions should incorporate assessment of actual comprehension and standardization of discharge instructions.

Acetaminophen pharmacokinetics in severely obese adolescents and young adults

BACKGROUND

Intravenous acetaminophen is commonly administered as an adjunctive to opioids during major surgical procedures, but neither the correct pharmacokinetic size descriptor nor the dose is certain in severely obese adolescents undergoing bariatric surgery.

METHODS

Adolescents, 14-20 years of age, with a body mass index (BMI) ≥95th percentile for age and sex or BMI ≥40 kg·m^-2 , presenting for laparoscopic or robotic assisted or vertical sleeve gastrectomy were administered intravenous acetaminophen (1000 mg) following completion of the surgical procedure. Venous blood was drawn for acetaminophen assay at eight time points, starting 15 minutes after completion of the infusion and up to 12 hours afterward. Time-concentration data profiles were analyzed using nonlinear mixed effects models. Parameter estimates were scaled to a 70-kg person using allometry. Normal fat mass was used to assess the impact of obesity on pharmacokinetic parameters.

RESULTS

The study cohort comprised 11 female patients, age 17 SD 2 years with a weight of 125 SD 19 kg and a mean BMI of 46 SD 5 kg·m^-2 . The plasma acetaminophen serum concentration was 17 (SD 4) μg·mL^-1 at 10-20 minutes after completion of the infusion and 5 (SD 6) μg·mL^-1 at 80-100 minutes. A two-compartment model, used to investigate pharmacokinetics, estimated clearance 10.6 (CV 72%) L·h·70 kg^-1 , intercompartment clearance 37.3 (CV 63%) L·h·70 kg^-1 , central volume of distribution 20.4 (CV 46%) L·70 kg^-1 , and peripheral volume of distribution 16.8 (CV 42%) L·70 kg^-1 . Clearance was best described using total body weight. Normal fat mass with a parameter that accounts for fat mass contribution (Ffat) of 0.88 best described volumes.

CONCLUSION

Current recommendations of acetaminophen to a maximum dose of 1000 mg resulted in serum concentrations below detection limits in all patients within 2 hours after administration. Dose is better predicted using total body mass with allometric scaling.

Assessing the Understanding of Pediatric-Oriented Medication Education Materials Versus Standard Available Education Materials

OBJECTIVES

The objective of this study was to determine if education material targeting children would improve understanding of medication indication, administration, and common side effects in pediatric subjects.

METHODS

This cross-sectional pilot study included students 7 to 11 years old from a suburban elementary school. Study participants were read either the US Food and Drug Administration-approved adult medication leaflet or a pediatric medication leaflet created at a first-grade reading level for levetiracetam (Keppra, UCB, Inc, Atlanta, GA). Students were asked a set of standardized survey questions to evaluate comprehension of side effects, medication indication, dosing frequency, administration, and overall impression of the leaflet.

RESULTS

Fifty-eight children were included. Fifty percent of the children were male, 79% were Caucasian, and the average age was 9 years. There was no statistical difference for demographics in the adult leaflet versus the pediatric leaflet group. Children correctly stated the indication for the medication in 30% of participants (9/30) in the adult leaflet group and 79% of participants (22/28) in the pediatric leaflet group, p = 0.002. The administration frequency question was answered correctly in 93% of the pediatric leaflet group (26/28) as compared to 73% in the adult leaflet group (22/30), p = 0.05. For questions about side effects and how to administer the medication, there was no difference between the groups. The responses regarding readability and understanding of the leaflets were significantly different in the pediatric leaflet group compared to the adult leaflet group, p = 0.001 and p = 0.001, respectively.

CONCLUSIONS

Leaflets designed for pediatric patients resulted in an improvement in the understanding of the indication for levetiracetam.

Evaluation of the children with acute acetaminophen overdose and intravenous N-acetylcysteine treatment

OBJECTIVE

To evaluate the demographic and clinical features associated with acetaminophen overdose and to identify the clinical use of IV (intravenous) N- Acetylcysteine (NAC) treatment in children.

METHODS

This prospective study was conducted in Kanuni Sultan Suleyman Training and Research Hospital between August 2016 and August 2017. A total of 59 patients with overdose acetaminophen ingestion were included in this study. The toxic dose for acute acetaminophen intake was defined as greater than 150 mg/kg. Rumack-Matthew nomogram was used to evaluate the risk of acute intoxication and to determine the decision of using antidote.

RESULTS

The mean age of the patients was 8.5±6.4 y and 34 of them (58%) were female. The mean time from ingestion to admission was 4.3±4.7 h. The mean ingested acetaminophen dose was 142.1±80 mg/kg. Twenty four patients (41%) received NAC and there were significant differences in terms of acetaminophen dose, creatinine and INR between antidote and decontamination therapy groups at admission time (p= 0.00, p= 0.03, p= 0.02, respectively). The complication due to antidote therapy was observed in only 1 patient.

CONCLUSIONS

This study confirms that the side effects due to IV NAC therapy are uncommon and it is generally well tolerated in children.

Are some people at increased risk of paracetamol-induced liver injury? A critical review of the literature

Purpose

Paracetamol is one of the world’s most commonly used drugs. In overdose, it is well established to be hepatotoxic. The aim of this review was to identify factors that have been, or actually are, associated with the development of liver injury after paracetamol exposure in humans.

Method

Google Scholar and PubMed were searched on various dates between December 2016 and March 2017. Papers identified had their references analysed for further studies that might be relevant.

Results

At the time of writing, there was little good quality clinical evidence—from studies of paracetamol overdose or therapeutic use—to suggest that any groups of people are relatively protected from, or are at greater risk of, liver injury. The factors that were historically used to indicate higher risk in the UK have no good quality clinical evidence to support their re-introduction into clinical practice. The safe (and still effective) oral dose of paracetamol in patients weighing less than 50 kg has not been established.

Conclusion

There is no patient group that is unequivocally at elevated risk of paracetamol-induced liver toxicity. We propose two clinical scenarios that warrant further research. Firstly, there is a need to establish whether the dose of paracetamol should be reduced in patients with low body weight. Secondly, if or when genomic information regarding individual patients becomes readily available to inform prescribing, we propose the contribution of the genome to paracetamol toxicity should be re-investigated with robustly designed studies. Such studies could enhance the safe use of one of the most frequently taken drugs.

Electronic supplementary material

The online version of this article (10.1007/s00228-017-2356-6) contains supplementary material, which is available to authorized users.

Estoque doméstico e uso de medicamentos por crianças no Vale do Jequitinhonha, Minas Gerais, Brasil

RESUMO Avaliaram-se o estoque doméstico e o uso de medicamentos por crianças e adolescentes de 20 municípios do Vale do Jequitinhonha (MG) por meio de estudo tipo inquérito populacional domiciliar. Realizaram-se análise descritiva e testes de associação. Dos 1.237 medicamentos encontrados, 27% estavam em locais de fácil acesso. Não houve associação entre profissões ligadas à área da saúde dos responsáveis com o uso. O grau de instrução ≤ a 4 anos de estudo aparece como de maior risco. As medicações prevalentes foram analgésicos/antipiréticos, antagonista H1 da histamina e antibióticos. Os dados mostram alta prevalência de estoque domiciliar com riscos para crianças, sendo necessárias ações educativas na região.

A clinical and safety review of paracetamol and ibuprofen in children

The antipyretic analgesics, paracetamol, and non-steroidal anti-inflammatory agents NSAIDs are one of the most widely used classes of medications in children. The aim of this review is to determine if there are any clinically relevant differences in safety between ibuprofen and paracetamol that may recommend one agent over the other in the management of fever and discomfort in children older than 3 months of age.

Carers' Medication Administration Errors in the Domiciliary Setting: A Systematic Review

Purpose

Medications are mostly taken in patients’ own homes, increasingly administered by carers, yet studies of medication safety have been largely conducted in the hospital setting. We aimed to review studies of how carers cause and/or prevent medication administration errors (MAEs) within the patient’s home; to identify types, prevalence and causes of these MAEs and any interventions to prevent them.

Methods

A narrative systematic review of literature published between 1 Jan 1946 and 23 Sep 2013 was carried out across the databases EMBASE, MEDLINE, PSYCHINFO, COCHRANE and CINAHL. Empirical studies were included where carers were responsible for preventing/causing MAEs in the home and standardised tools used for data extraction and quality assessment.

Results

Thirty-six papers met the criteria for narrative review, 33 of which included parents caring for children, two predominantly comprised adult children and spouses caring for older parents/partners, and one focused on paid carers mostly looking after older adults. The carer administration error rate ranged from 1.9 to 33% of medications administered and from 12 to 92.7% of carers administering medication. These included dosage errors, omitted administration, wrong medication and wrong time or route of administration. Contributory factors included individual carer factors (e.g. carer age), environmental factors (e.g. storage), medication factors (e.g. number of medicines), prescription communication factors (e.g. comprehensibility of instructions), psychosocial factors (e.g. carer-to-carer communication), and care-recipient factors (e.g. recipient age). The few interventions effective in preventing MAEs involved carer training and tailored equipment.

Conclusion

This review shows that home medication administration errors made by carers are a potentially serious patient safety issue. Carers made similar errors to those made by professionals in other contexts and a wide variety of contributory factors were identified. The home care setting should be a priority for the development of patient safety interventions.

Treatment of Pain in Pediatric Patients

A growing body of evidence demonstrates that untreated pain is associated with adverse consequences that can compromise clinical and developmental outcomes in children but that these adverse consequences can be prevented or attenuated by appropriate analgesic therapy. Thus, effective treatment of acute pain must be a clinical priority for children of all ages. Over the past 20 years, extensive pediatric research exploring pain assessment, developmental pharmacology of analgesics, and the clinical use of analgesics has dispelled many myths and misconceptions about pain management in pediatric patients; proven that analgesics can be used safely in neonates, infants, and children; and provided a framework for the development of pediatric pain management guidelines. This article reviews guidelines recommended for managing acute pain in pediatric patients and the treatment options for children experiencing acute pain. Contemporary issues regarding acetaminophen, nonsteroidal anti-inflammatory agents, and opioids are discussed.

Preventing Medication Errors at Home

Medication errors occur at the hands of not only health care professionals but also of in-home patient caregivers or the patients themselves. This article explores the various causes for therapeutic errors in pediatric as well as elderly patients within their home settings. In addition, suggestions are provided on educating the patients and their caregivers on the prevention of medication errors.

Nonprescription Medication Use by Infants and Children: Product Labeling Versus Evidence-Based Medicine

Nonprescription or over-the-counter (OTC) medication use has been an increasing market over the past years. In addition to adult use of these medications, children also account for this trend. Although relatively safe when used according to package labeling and professional direction, serious adverse drug events and toxicity associated withOTC use among infants and children are becoming more common. The purpose of this review is to help the health care practitioner select and counsel on pediatric OTC products based on labeling and efficacy data in 3 main areas: cough and cold, analgesics, and treatment of gastroenteritis.

Antidote Use in the Critically Ill Poisoned Patient

The proper use of antidotes in the intensive care setting when combined with appropriate general supportive care may reduce the morbidity and mortality associated with severe poisonings. The more commonly used antidotes that may be encountered in the intensive care unit ( N-acetylcysteine, ethanol, fomepizole, physostigmine, naloxone, flumazenil, sodium bicarbonate, octreotide, pyridoxine, cyanide antidote kit, pralidoxime, atropine, digoxin immune Fab, glucagon, calcium gluconate and chloride, deferoxamine, phytonadione, botulism antitoxin, methylene blue, and Crotaline snake antivenom) are reviewed. Proper indications for their use and knowledge of the possible adverse effects accompanying antidotal therapy will allow the physician to appropriately manage the severely poisoned patient.

Acute Liver Failure and Hepatic Encephalopathy After Cleft Palate Repair

Paracetamol is the most commonly used analgesic after cleft palate repair. It has rarely caused acute hepatic failure at therapeutic or supratherapeutic doses. Only one case of therapeutic paracetamol toxicity after cleft palate repair had been reported previously. Here, we present a similar patient who developed acute liver failure and hepatic encephalopathy after an uncomplicated cleft palate surgery. Lack of large prospective trials in young children due to ethical concerns increases the value of the case reports of acetaminophen toxicity at therapeutic doses. The dosing recommendations of paracetamol may need to be reconsidered after cleft palate surgery.

Paracetamol-associated acute liver failure in Australian and New Zealand children: high rate of medication errors

BACKGROUND

In children, paracetamol overdose due to deliberate self-poisoning, accidental exposure or medication errors can lead to paediatric acute liver failure and death. In Australia and New Zealand, the nature of ingestion and outcomes of paracetamol-associated paediatric acute liver failure have not been described.

OBJECTIVE

To describe the nature and outcomes of paracetamol-associated paediatric acute liver failure.

DESIGN

Retrospective analysis of paracetamol-associated paediatric acute liver failure cases presenting 2002-2012.

SETTING

New Zealand and Queensland Paediatric Liver Transplant Services.

RESULTS

14 of 54 cases of paediatric acute liver failure were attributed to paracetamol, the majority were secondary to medication errors. 12 of the 14 children were under the age of 5 years. Seven children received doses in excess of 120 mg/kg/day. Many of the other children received either a double dose, too frequent administration, coadministration of other medicines containing paracetamol or regular paracetamol for up to 24 days. Three children underwent transplant. One of these and one other child died.

CONCLUSIONS

In Australia and New Zealand, paracetamol overdose secondary to medication errors is the leading cause of paediatric acute liver failure. A review of regional safety practices surrounding paracetamol use in children is indicated.

Acute pain management in infants and children-Part 1: Pain pathways, pain assessment, and outpatient pain management

The field of pediatric pain management continues to evolve, with ongoing changes in our appreciation of the impact of pain on our fragile patients, a better understanding of how to assess pain, and refinements of the medications and techniques used to provide analgesia to patients with acute pain of various etiologies. The following article reviews the techniques for the assessment of pain, including various age-specific pain scoring systems. The pharmacological management of pain is discussed, including the use of agents that inhibit prostaglandin formation-nonsteroidal anti-inflammatory agents and acetaminophen-as well as the "weak opioids" that are commonly used when oral administration is feasible for the treatment of mild to moderate pain.

Paracetamol: a focus for the general pediatrician

Paracetamol (acetaminophen) is one of the most popular and widely used drugs for the treatment of pain and fever in children. This drug has multiple mechanisms of action, but its pharmacodynamic is still not well known. The central nervous system is the main site of action and it mirrors the paracetamol effect compartment. The recommended dosages and routes of administration should be different whether paracetamol is used for the treatment of pain or fever. For example, the rectal route, while being efficacious for the treatment of fever, should be avoided in pain management. Paracetamol is a safe drug, but some clinical conditions and concomitant drugs, which are frequent in clinical practice, may increase the risk of paracetamol toxicity. Therefore, it is important to optimize its administration to avoid overdoses and maximize its effect. The principal mediator of the paracetamol toxicity is the N-acetyl-p-benzo-quinone imine (NAPQI), a toxic product of the paracetamol metabolism, which could bind cysteine groups on proteins forming paracetamol-protein adduct in the liver.

CONCLUSION

Although frequently prescribed, the concept of "effect compartment concentration" and the possible co-factors that could cause toxicity at recommended doses are not familiar to all pediatricians and general practitioners. We reviewed the literature concerning paracetamol mechanisms of action, we highlighted some relevant pharmacodynamic concepts for clinical practice, and we summarized the possible risk factors for toxicity at therapeutic dosages.

Attention to postoperative pain control in children

Even with the rapid development of pediatric postoperative pain management, pediatric patients have remained undertreated for postoperative pain because of difficulty in pain assessment and concerns regarding side effects of opioid analgesics. Although there are no perfect pain assessment techniques and no absolutely safe analgesics, proper monitoring and an individualized analgesic plan after due consideration of age, operative procedures, and underlying illness, using multimodal analgesics may improve the quality of pain control in children.

Knowledge and practices of paracetamol administration among caregivers of pediatric age group patients

Introduction:

Paracetamol is a widely used over the counter drug for pyrexia and mild to moderate pain in all age groups.

Objective:

To assess the knowledge and practices of paracetamol administration among caregivers of the pediatric age group patients attending the university family practice.

Materials and Methods:

A clinic-based descriptive cross-sectional survey was carried out among clients attending the family practice of the Faculty of Medicine, University of Kelaniya, Sri Lanka using pretested interviewer administrated questionnaire.

Results:

Ninety eight caregivers Participated. Majority were females (97%) with a mean age of 32 years. Age of the patients ranged from 1 to 132 (mean: 48 months). The commonest indication for paracetamol was fever (98%) and in 99% of the patients, mother was the administrator. Forty three percent of the children received a supra-therapeutic dose (>15 mg/kg/dose). None exceeded 20 mg/kg/dose. 16% exceeded the recommended dosing frequency. Children above 3 years were at an increased risk of receiving incorrect paracetamol dose (χ² =19.55, df=1, P>0.001) A majority (75%) said they followed doctors’ advice on paracetamol dose. There was no association between level of education of care giver, deciding dose as directed by doctor and product information leaflet and dosing accuracy. Only one caregiver was able to calculate the paracetamol dose according to weight. A majority (85%) knew about paracetamol poisoning but it was not associated with dosing accuracy.

Conclusion and Recommendations:

Administration of supratheraputic doses of paracetamol is common and risk increased with child's age. Knowledge on calculating the weight appropriate paracetamol dose is poor. Physicians should educate care givers on judicious use of paracetamol.

Early Risk Factors of Moderate/Severe Hepatotoxicity After Suicide Attempts With Acetaminophen in 11- to 15-Year-Old Children

Objective. To characterize early risk factors of moderate/severe hepatotoxicity in a pediatric population with acetaminophen overdose, due to suicide attempt, admitted to a general secondary-level pediatric department. Methods. A retrospective case study of 107 patients, 11 to 15 years old. Results. There was a highly significant relationship between the number of episodes of prehospital vomiting and several elevated hepatologically relevant biochemical parameters, for example, maximum aspartate aminotransferase (P = .0001). The duration of the latency time before initiation of N-acetylcysteine treatment was significantly related to the elevation of several hepatologically relevant biochemical parameters (eg, maximum γ-glutamyl transferase; P = .0001). Patients suffering from illness prior to their suicide attempt had significantly greater elevations of their hepatologically relevant biochemical parameters, for example, maximum alanine aminotransferase (P = .01) levels than healthy patients. Conclusion. By use of risk factors, it is possible to identify pediatric patients at increased risk of moderate/severe hepatotoxicity at an early stage of admission.

The safety of prescribing opioids in pediatrics

INTRODUCTION

Pain management has become a widely discussed topic throughout all medical subspecialties. Although pediatric pain management has evolved significantly in its recent history, there is continued interest in the adequacy of pain treatment, both in the acute inpatient setting as well as the postoperative and chronic pain management setting. Although health care providers are becoming more aggressive concerning prompt and effective treatment of acute and chronic pain, safety data and adverse effects of narcotic analgesics may be overlooked.

AREAS COVERED

The authors review the current paradigm of acute pain management with an emphasis on oral narcotic medications, and the safety data available concerning prescribing these medications.

EXPERT OPINION

Further, the authors present their opinions concerning current and future practices regarding the prescribing practice of opiate analgesics, as well as a step-wise approach for acute oral pain management.

Chronic acetaminophen exposure in pediatric acute liver failure

BACKGROUND

Acetaminophen (N-acetyl-p-aminophenol [APAP]) is a widely used medication that can cause hepatotoxicity. We examined characteristics and outcomes of children with chronic exposure (CE) to APAP in the multinational Pediatric Acute Liver Failure (PALF) Study.

METHODS

A total of 895 children enrolled from 2002 to 2009 were grouped by APAP exposure history as: CE (received multiple doses \x{2265}2 days; n = 83), single dose exposure (SE; n = 85), and no exposure (NE; n = 498). CE was the reference group for pairwise comparisons. Median values are shown.

RESULTS

Patients with CE compared with those with SE were younger (3.5 vs 15.2 years, P < .0001), less likely to be female (46% vs 82%, P < .0001), and more likely to be Hispanic (25% vs 7%, P = .001), but they did not differ significantly from the NE group. At enrollment, total bilirubin was lower with CE than with NE (3.2 vs 13.1 mg/dL, P < .001). Alanine aminotransferase levels were higher with CE than with NE (2384 vs 855 IU/L, P < .0001), but lower than with SE (5140 IU/L, P < .0001). Survival without liver transplantation at 21 days was worse for CE than for SE (68% vs 92%, P = .0004) but better than for NE (49%, P = .008).

CONCLUSIONS

Children in the PALF study with CE had lower bilirubin and higher alanine aminotransferase than those with NE. Outcomes with CE were worse than with SE but better than with NE. Potential reasons for this outcomes advantage over non-APAP-exposed subjects should be explored.

Non-pharmacological Management of Fever in Otherwise Healthy Children

BACKGROUND

Fever is a common childhood problem faced in both hospital and community settings. In many cases the fever is associated with mild to moderate self-limiting illnesses. There has been a rapid increase in antipyretic use as the means of managing or treating this adaptive physiological response to infection. The use of alternative means of caring for a febrile child could minimise the amount of antipyretics administered to children and thereby reduce the potential risks.

OBJECTIVE

The objective of this systematic review was to establish what non-pharmacological practices are effective in managing fever in children, three months to 12 years of age, who are otherwise healthy.

INCLUSION CRITERIA

Interventions for inclusion were physiological e.g. maintenance of hydration and rest, and external cooling, either direct e.g. sponging, clothing, or environmental e.g. fans, ambient temperature. Outcomes of interest were effect on fever, increase in comfort, decrease in parental anxiety and reduction in unnecessary use of health services.

SEARCH STRATEGY

The search sought English, Spanish, Portuguese, Mandarin and Italian language studies, published 2001-2011 in 12 major databases.

CRITICAL APPRAISAL, DATA EXTRACTION AND DATA SYNTHESIS

Critical appraisal of and data extraction from eligible studies were undertaken using standardised tools developed by the Joanna Briggs Institute. As statistical pooling of data was precluded, the findings are presented in narrative form.

RESULTS

Twelve randomised controlled trials were included, involving 986 children in total. Only one intervention identified in the review protocol - direct external cooling measures - was addressed by the studies. Eleven studies included sponging as an intervention while one also included clothing (unwrapping). No studies investigated physiological interventions, (e.g. hydration or rest), or environmental cooling measures, (e.g. fans or ambient temperature) as separate interventions. Three of these interventions (encouragement of fluid intake, rest and fans) were reported as part of the standard care provided to participants in several studies or were controlled in the study (ambient temperature). Only two of the four outcomes identified in the review protocol were examined (effect on fever (all 12 studies) and patient comfort). Although tepid sponging alone resulted in an immediate decrease in temperature, this response was of short duration, with antipyretics or antipyretics plus sponging having a more lasting effect. In addition, the observed levels of discomfort of the sponged children were higher than the other groups. For both measures, this effect was not statistically significant in every case.

CONCLUSION

The care of a febrile child needs to be individualised, based on current knowledge of the effectiveness and risks of interventions. The administration of antipyretics should be minimised, used selectively and with caution, even in otherwise healthy children. The results of this systematic review support previous findings that routine tepid sponging does not have an overall beneficial effect. However measures such as encouraging fluid intake and unwrapping the child should be encouraged.

IMPLICATIONS FOR PRACTICE

The two foci of care should be the child and the parents/primary caregiver. For the child, care should aim to support the body's physiological responses i.e. maintain hydration, minimise use of antipyretics. Support the parents to reduce anxiety e.g. by involving them in care and providing appropriate education, particularly in respect to correct dosages of antipyretics.

IMPLICATIONS FOR RESEARCH

Given the now well demonstrated discomfort engendered by tepid sponging, its use in treating febrile children is no longer advocated and does not warrant further research. However aspects of other non-pharmacological interventions have not been so well researched e.g. parental response to advice on fluid intake and appropriate clothing.

Accuracy of acetaminophen dosing in children by caregivers in Saudi Arabia

BACKGROUND AND OBJECTIVES

Fever contributes to a significant number of visits by children to the emergency department (ED), where it is often treated with acetaminophen. The objective of this study was to determine if caregivers give children with fever an accurate dose of acetaminophen and determine factors associated with dosing inaccuracy.

DESIGN AND SETTING

Cross-sectional study at the ED of a tertiary referral center over a 6-month period (March-August 2008)

METHODS

We interviewed 200 caregivers who gave acetaminophen to children with fever in the preceding 24 hours.

RESULTS

Of 200 caregivers, 178 (89%) were included in the study. Seventy-six caregivers (43%) gave an accurate dose of acetaminophen, 54 (30%) gave a subtherapeutic dose, and 48 (27%) gave supratherapeutic doses. Caregivers who gave accurate doses were more likely to give an acetaminophen dose in less than a 4-hour frequency (risk ratio [RR] 0.63. P<.04, 95% CI, 0.37-1.07). Patients receiving acetaminophen per rectum had a significantly greater rate of supratherapeutic doses than those receiving the drug by mouth (9/28 [32%] versus 39/149 [26%]), respectively (95% CI=0.14 to 0.48). Sixteen caregivers (9%) gave more than five doses per 24 hours (RR, 1.11; 95% CI, 0.74-1.67). Physicians, pharmacists, and parents (the latter with intermediate and secondary levels education) more often gave inaccurate doses, but the differences were not statistically significant suggesting that they may be the source of inaccurate dosing. (RR, 1.29; 95% CI, 0.95-1.75), (RR, 1.27 95% CI, 0.75-2.18), (RR, 1.28; 95% CI, 0.91-1.79), and (RR, 1.20, 95% CI, 0.92-1.57), respectively.

CONCLUSION

More than half of caregivers gave an inaccurate dose of acetaminophen to children suggesting that education may be valuable in ameliorating this common problem.

Paracetamol prescribing in primary care: too little and too much?

AIMS

To assess the level of paracetamol off label prescribing in the community and the potential for paracetamol under or overdosing.

METHODS

The Scottish Practice Team Information (PTI) database containing prescribing data for approximately 35,839 children aged (0-12 years) was analysed for paracetamol prescriptions for the year 2006. Off label prescribing was defined as prescribing outside the BNFc age and dose recommendations.

RESULTS

Two thousand seven hundred and sixty-one children aged 0-12 years were issued with 4423 prescriptions for paracetamol. (1446 males). Children 1-5 years (1329, 42.2%) accounted for 48.9% (2164) of all paracetamol prescriptions. Eighteen per cent (793) of individual prescriptions were off label and after accounting for repeat prescriptions 625 (22.75%) individuals were exposed to off label prescriptions. A further 15% (668) of prescriptions contained insufficient dosage data to determine their status, 13.3% (368) being underdosed and 4.4% (121) overdosed at least once during the study year. In total 11.3% (502) of all prescriptions were classified as underdose, 2.9% (127) as overdose and 15% (667) had no dosage instructions. Age was significantly related to non recommended dosage (χ(2) test, P < 0.001). Children 1-3 months old were at highest risk of being overdosed; 27% of prescriptions recommended actual or potential overdosage and 25% (354) of children aged 6-12 years were prescribed an actual or potential underdose. Overall 57.2% of all prescriptions failed to comply with current BNFc recommendations.

CONCLUSION

Paracetamol off label prescribing is common in primary care, with relatively high levels of potential overdosing in the youngest children and potential underdosing in the oldest children.

Acetaminophen and ibuprofen in the management of fever and mild to moderate pain in children

Acetaminophen has become the non-narcotic of choice for children because of concerns regarding the connection between acetylsalicylic acid exposure and Reye's syndrome. Ibuprofen, recently granted over-the-counter status for children over two years of age, offers another choice for treatment. The efficacy and safety of both drugs have been studied in numerous clinical trials. This paper reviews the published evidence about the efficacy and safety of acetaminophen and ibuprofen with regard to treating fever and mild to moderate pain in children.

Therapeutic acetaminophen is not associated with liver injury in children: a systematic review

BACKGROUND

Concern exists about the potential for liver injury with therapeutic dosing of acetaminophen in children.

OBJECTIVE

We systematically reviewed the medical literature to determine the rate at which liver injury has been reported for children prescribed therapeutic doses of acetaminophen (≤75 mg/kg per day orally or intravenously or ≤100 mg/kg per day rectally).

METHODS

We searched Medline, Embase, and the Cochrane Central Register of Controlled Trials to locate all studies in which acetaminophen was administered to a defined pediatric population for ≥24 hours and for all case reports of liver injury after therapeutic acetaminophen dosing. Trained reviewers extracted data from each report. Major and minor hepatic adverse events (AEs) were defined prospectively. Causality was assessed by using the Naranjo algorithm.

RESULTS

A total of 62 studies that enrolled 32,414 children were included. No child (0% [95% confidence interval: 0.000-0.009]) was reported to have exhibited signs or symptoms of liver disease, to have received an antidote or transplantation, or to have died. Major or minor hepatic AEs were reported for 10 children (0.031% [95% confidence interval: 0.015-0.057]). The highest transaminase value reported was 600 IU/L. Naranjo scores (2-3) suggested "possible" causation. Twenty-two case reports were identified. In 9 cases, the Naranjo score suggested "probable" causation (5-6).

CONCLUSIONS

Hepatoxicity after therapeutic dosing of acetaminophen in children is rarely reported in defined-population studies. Case reports suggest that this phenomenon may occur, but few reports contain sufficient data to support a probable causal relationship.

Parental calculation of pediatric paracetamol dose: a randomized trial comparing the Parental Analgesia Slide with product information leaflets

OBJECTIVES

To compare the ability of parents to calculate and demonstrate the correct paracetamol (acetaminophen) dose, interval, and frequency for their child when using either product information leaflets or the Parental Analgesia Slide.

BACKGROUND

Prescribing information provided with over-the-counter medication may be a source of confusion for parents delivering analgesics to children at home. Accurate administration is essential to ensure safe and effective treatment of children's pain or fever. The Parental Analgesia Slide is a new device developed with the objective of improving parental dosing accuracy.

METHODS

In this prospective, randomized study, 160 parents accompanying children aged between one and 13 years old were randomly allocated to complete a paracetamol dose calculation and administration questionnaire using one of two sources of prescribing information. Absolute percentage dose error and the number of correct dosage intervals, frequencies, and demonstrated drug volumes were compared.

RESULTS

Use of the Parental Analgesia Slide resulted in a reduction in the absolute percentage dose error from a median of 33.3 to 0% (P < 0.001) and an increase in the number of correct dosage intervals and frequencies (59/80 to 70/80, P = 0.046). There was no difference in the number of correctly demonstrated drug volumes (P = 0.082) despite a greater number of parents opting to use an oral syringe rather than a dosing spoon when using the Slide (24/80 to 44/80, P = 0.002).

CONCLUSIONS

The Parental Analgesia Slide resulted in improved parental ability to calculate paracetamol dose, interval, and frequency while preserving their ability to demonstrate an accurate drug volume.

[Therapy of perioperative pain in pediatric urology]

Difficulties in estimating the kind and intensity of pain as well as uncertainty in drug selection and dosing are often responsible for a suboptimal treatment of pain therapy in the various age groups in childhood. The following article will help to minimize these deficits by contributing full details of safe and effective concepts for perioperative pain therapy in childhood.

Life-threatening hyponatremia due to intravenous n-acetylcysteine treatment in an infant: a case report

Introduction

N-acetylcysteine has proven to be effective in paracetamol intoxications, but there is no consensus regarding its way of administration. Here, we report a case to highlight the importance of careful management of intravenous n-acetylcysteine.

Case presentation

A two-month old infant was seen in our paediatric emergency department due to paracetamol poisoning after repeated supratherapeutic doses. She was treated with intravenous n-acetylcysteine diluted with dextrose 5%, according to the 20-hour standard protocol. Eight hours later she developed two tonic-clonic seizures and was subsequently intubated. By that time, she had received almost 1 liter of 5% dextrose, and serum sodium was 114 mg/dL. A rapid correction was done with hypertonic saline and the child experienced a good outcome, without any sequelae.

Conclusion

Intravenous n-acetylcysteine administration must be done carefully. Amount of liquid administrated and sodium monitoring should be kept in mind, with special care in small children.

Acute non-oliguric kidney failure and cholestatic hepatitis induced by ibuprofen and acetaminophen: a case report

The combined use of acetaminophen with ibuprofen has long been in clinical use because the target of action of each drug is different and they do not interfere with each other. Appropriate dosing and managing of these drugs do not likely lead to organ toxicity. However, both acetaminophen and ibuprofen can induce liver problems and acute kidney failure, respectively, if administered at high doses. We report the case of a female child, in treatment with both acetaminophen and ibuprofen, administered at therapeutic antipyretic doses in condition of volume depletion, who suffered acute kidney and liver failure.

CONCLUSION

The combined ibuprofen and acetaminophen treatment, even if administered at therapeutic dosages and in a reduced number of doses, may be dangerous in conditions of volume depletion.

Emergency department visits attributed to selected analgesics, United States, 2004-2005

PURPOSE

To estimate the rate of emergency department (ED) visits attributed to selected analgesic-containing medications.

METHODS

We used a nationally representative public health surveillance system to provide estimates of adverse events identified in EDs, and a national telephone survey to provide estimates of selected analgesic-containing medication usage in the US population, 2004-2005. Analysis was restricted to products containing acetaminophen, aspirin, ibuprofen, or naproxen. Types of adverse events and outcomes were compared. Estimated numbers and rates of ED visits were calculated by analgesic groupings and patient age groups.

RESULTS

The estimated overall rate of ED visits attributed to analgesic-containing medications was 1.6 visits /100,000 users per week. The very old and very young had the highest rates; there were minimal differences in rates by patient gender. Acetaminophen was the attributed drug with the most estimated ED visits and generally had the highest rates of ED visits. The highest estimated rate for a specific product group was among subjects 18-64 years of age taking narcotic-acetaminophen products (8.9 ED visits /100,000 users per week). Overall, 12% of patients presenting to EDs with analgesic-attributed events were hospitalized.

CONCLUSIONS

Rates of ED visits due to analgesics vary depending on the age of the patient and the product; most do not result in hospitalization. Although the rate of emergency visits is relatively low, because of the wide use of the analgesics, public health impact is considerable.