Metamizole vs. ibuprofen at home after day case surgery: A double-blind randomised controlled noninferiority trial

Antipyretic effect of oral dipyrone (Metamizole) compared to oral ibuprofen in febrile children: a systematic review and meta-analysis

BACKGROUND

Dipyrone (Metamizole) is a potent pain reliever and fever reducer with muscle relaxant properties, most commonly used as an analgesic and antipyretic agent. Despite the fact that it has been banned in many high-income countries following confirmed studies of fatal agranulocytosis and adverse drug reactions, it is still widely used in various countries of the world. However, the antipyretic therapeutic indications of dipyrone in febrile children are currently unknown, and there is little information on the advantages and disadvantages of using dipyrone in febrile children. In febrile children, we expected that dipyrone's antipyretic effectiveness wouldn't be any more effective than ibuprofen. Therefore, the purpose of this research is to evaluate the effectiveness of oral dipyrone and oral ibuprofen as antipyretics in febrile children.

METHODS

Several databases, including PubMed, Scopus, Web of Science, and Cochrane Library, were searched thoroughly using a pre-established search strategy for potential research. The studies included in this analysis comprised randomized controlled trials that compared the antipyretic effects of oral ibuprofen and oral dipyrone in febrile children. Data analysis was carried out using RevMan 5.4 software.

RESULTS

Three studies were selected among the 27 publications we discovered to be applicable, and they underwent qualitative and quantitative analysis. The pooled analysis revealed no discernible difference between oral dipyrone and oral ibuprofen in terms of their antipyretic effects (Mean difference (MD) = 0.06; 95% confidence interval (CI): -0.08, 0.20).

CONCLUSION

Both oral dipyrone and ibuprofen are effective in reducing high-temperature levels in febrile children without any significant difference.

Metamizole in the Management of Musculoskeletal Disorders: Current Concept Review

Metamizole, or dipyrone, has been used for decades as a non-narcotic analgesic, providing pain relief from musculoskeletal disorders and antipyretic and antispasmolytic properties. Despite being in use since the 1920s, its mechanism of action still needs to be discovered. Despite causing fewer adverse effects when compared to other analgesics, its harmful effects on the blood and lack of evidence regarding its teratogenicity make the usage of the drug questionable, which has led to it being removed from the drug market of various countries. This narrative review aims to provide a detailed insight into the mechanism of action and efficacy, comparing its effectiveness and safety with other classes of drugs and the safety profile of metamizole.

Enhanced recovery protocols for ambulatory surgery

INTRODUCTION

In the United States, ambulatory surgeries account for up to 87% of all surgical procedures. (1) It was estimated that 19.2 million ambulatory surgeries were performed in 2018 (https://www.hcup-us.ahrq.gov/reports/statbriefs/sb287-Ambulatory-Surgery-Overview-2019.pdf). Cataract procedures and musculoskeletal surgeries are the most common surgical interventions performed in ambulatory centers. However, more complex surgical interventions, such as sleeve gastrectomies, oncological, and spine surgeries, and even arthroplasties are routinely performed as day cases or in a model of an ambulatory extended recovery. (2-5) The ambulatory surgery centers industry has grown since 2017 by 1.1% per year and reached a market size of $31.2 billion. According to the Ambulatory Surgery Center Association, there is a potential to save $57.6 billion in Medicare costs over the next decade (https://www.ibisworld.com/industry-statistics/market-size/ambulatory-surgery-centers-united-states/). These data suggest an expected rise in the volume of ambulatory (same day) or extended ambulatory (23 h) surgeries in coming years. Similar increases are also observed in other countries. For example, 75% of elective surgeries are performed as same-day surgery in the United Kingdom. (6) To reduce costs and improve the quality of care after those more complex procedures, ambulatory surgery centers have started implementing patient-centered, high-quality, value-based practices. To achieve those goals, Enhanced Recovery After Surgery (ERAS) protocols have been implemented to reduce the length of stay, decrease costs, increase patients' satisfaction, and transform clinical practices. The ERAS fundamentals for ambulatory surgery are based on five pillars, including (1) preoperative patient counseling, education, and optimization; (2) multimodal and opioid-sparing analgesia; (3) nausea and vomiting, wound infection, and venous thromboembolism prophylaxis; (4) maintenance of euvolemia; and (5) encouragement of early mobility. Those pillars rely on interdisciplinary teamwork led by anesthesiologists, surgery-specific workgroups, and safety culture. (2) Research shows that a team of ambulatory anesthesiologists is crucial in improving postoperative nausea and vomiting (PONV) and pain control. (7) This review will summarize the current evidence on the elements and clinical importance of implementing ERAS protocol for ambulatory surgery.

Antipyretic Effect of Oral Dipyrone (Metamizole) Compared to Oral Ibuprofen in febrile Children: A Systematic Review and Meta-Analysis.. [DOI: 10.21203/rs.3.rs-2920290/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0]

Background The nonsteroidal anti-inflammatory medication dipyrone (metamizole) is most frequently used as a painkiller as well as an anti - pyretic. Despite the fact that it has been banned in many high-income countries following confirmed studies of fatal agranulocytosis and adverse drug reactions, it is still widely used in various countries of the world. However, the antipyretic therapeutic indications of dipyrone in febrile children are currently unknown, and there is little information on the advantages and disadvantages of using dipyrone in febrile youngsters. In febrile youngsters, we expected that dipyrone's antipyretic effectiveness wouldn't be any more effective than ibuprofen. Therefore, the purpose of this research is to evaluate the effectiveness of oral dipyrone and oral ibuprofen as antipyretics in febrile children. Methods Several databases, including PubMed, Scopus, Web of Science, and Cochrane Library, were searched thoroughly using a pre-established search strategy for potential research. The studies included in this analysis comprised randomized controlled trials that compared the antipyretic effects of oral ibuprofen and oral dipyrone in febrile kids. Data analysis was carried out using Revman 5.4 software. Results Three studies were selected among the 27 publications we discovered to be applicable, and they underwent qualitative and quantitative analysis. The pooled analysis revealed no discernible difference between oral dipyrone and oral ibuprofen in terms of their antipyretic effects (Mean difference (MD) = 0.06; 95% confidence interval (CI): -0.08, 0.20). Conclusion Both oral dipyrone and ibuprofen are effective in reducing high-temperature levels in febrile children without any significant difference.

Additive or synergistic analgesic effect of metamizole on standard pain treatment at home after arthroscopic shoulder surgery: A randomised controlled superiority trial

BACKGROUND

There is growing evidence that the analgesic effect of metamizole is mediated at least partly by central mechanisms, including the endocannabinoid/endovanilloid system. Consequently, metamizole may have additive or even synergistic analgesic effects with paracetamol and nonsteroidal anti-inflammatory drugs (NSAID).

OBJECTIVE

This study aimed to assess if triple therapy with metamizole, ibuprofen and paracetamol (MIP) is superior to double therapy with ibuprofen and paracetamol (i.p.) in treating pain at home after ambulatory arthroscopic shoulder surgery.

DESIGN/SETTING/PATIENTS/INTERVENTION

In this double-blind, controlled, high-volume single centre, superiority trial, 110 patients undergoing elective ambulatory arthroscopic shoulder surgery were randomised to receive either MIP ( n  = 55) or i.p. ( n  = 55) orally for 4 days between December 2019 and November 2021. Pain intensity at movement and rest, using a numeric rating scale (NRS), perceived pain relief, use of rescue medication and adverse effects of study medication were recorded at the post-anaesthesia care unit (PACU) and on postoperative day (POD) 1 to 4 and 7. Quality of Recovery (QoR) and satisfaction with study medication were measured at POD 7 with telephone follow-up.

MAIN OUTCOME MEASURE

The primary outcome measure was postoperative pain intensity on movement measured by an 11-point NRS (where 0 = no pain and 10 = worst pain imaginable) on POD 1.

RESULTS

For the primary outcome, superiority of MIP in reducing postoperative pain at movement on POD 1 was not confirmed: mean difference NRS [95% confidence interval (CI), -0.08 (-1.00 to 0.84)]. For pain on movement and at rest, no significant differences were found between groups in the PACU nor on POD 1 to 4 or day 7. Nausea was reported significantly more frequently in the metamizole group (22.6 vs. 58.5; P  < 0.001). Other adverse effects of study medication, rescue opioid consumption, perceived pain relief, QoR at POD 7, and overall patient satisfaction were similar in both groups.

CONCLUSION

Clinically, triple oral treatment with metamizole, paracetamol and ibuprofen is not superior to oral paracetamol and ibuprofen in multimodal pain treatment at home after ambulatory arthroscopic shoulder surgery.

TRIAL REGISTRATION

European Union Clinical Trials Register 2019-002801-23 and Clinicaltrials.gov NCT04082728.

Analgesic benefit of metamizole and ibuprofen vs. either medication alone: a randomized clinical trial

BACKGROUND

Postoperative pain relief remains a key problem after surgery. Multimodal pain therapy has proven beneficial in alleviating pain to a certain extent. However, when combining non-opioids, the focus has been on NSAIDs and paracetamol, but effects of combined use are only moderate. Metamizole could be a potent adjunct, due to its preclusion in several countries, data on its combined use are sparse, despite its common use in many countries. The aim of this study was to examine whether the combination of metamizole and ibuprofen is superior in relieving postoperative pain to either drug alone.

METHODS

For this randomized, placebo-controlled, cross-over study, 35 patients undergoing bilateral lower third molar extraction were randomized. Each patient received three applications of 1000mg metamizole + 400mg ibuprofen for surgery on one side and either 1000mg metamizole + placebo or 400mg ibuprofen + placebo on the other side. Pain ratings, rescue-medication (tramadol), and sleep were assessed for 18 hours.

RESULTS

The combined treatment of metamizole and ibuprofen showed lower mean pain scores over 12 hours than ibuprofen (2.4±1.3 vs 3.8±1.6; P=0.005)). Further, combined treatment showed lower mean pain scores over 6 hours than ibuprofen (2.0±1.2 vs. 3.1±1.6; P=0.022) or metamizole alone (2.0±1.2 vs. 3.3±1.7; P=0.015). Consumption of rescue medication was lowest in the combination-group (25% vs. 46%-metamizole; 50%-ibuprofen). The trial was stopped prematurely as the COVID-pandemic halted elective surgeries.

CONCLUSIONS

Combined use enables superior pain control compared to ibuprofen after molar extraction and tends to be superior to metamizole alone. The premature study-termination may overestimate this effect.

One-month recovery profile and prevalence and predictors of quality of recovery after painful day case surgery: Secondary analysis of a randomized controlled trial

Background/Objectives

This study aimed to study one-month recovery profile and to identify predictors of Quality of Recovery (QOR) after painful day surgery and investigate the influence of pain therapy on QOR.

Methods/Design

This is a secondary analysis of a single-centre, randomised controlled trial of 200 patients undergoing ambulatory haemorrhoid surgery, arthroscopic shoulder or knee surgery, or inguinal hernia repair between January 2016 and March 2017. Primary endpoints were one-month recovery profile and prevalence of poor/good QOR measured by the Functional Recovery Index (FRI), the Global Surgical Recovery index and the EuroQol questionnaire at postoperative day (POD) 1 to 4, 7, 14 and 28. Multiple logistic regression analysis was performed to determine predictors of QOR at POD 7, 14, and 28. Differences in QOR between pain treatment groups were analysed using the Mann-Whitney U test.

Results

Four weeks after haemorrhoid surgery, inguinal hernia repair, arthroscopic knee and arthroscopic shoulder surgery, good QOR was present in 71%, 76%, 57% and 24% respectively. Poor QOR was present in 5%, 0%, 7% and 29%, respectively. At POD 7 and POD 28, predictors for poor/intermediate QOR were type of surgery and a high postoperative pain level at POD 4. Male gender was another predictor at POD 7. Female gender and having a paid job were also predictors at POD 28. Type of surgery and long term fear of surgery were predictors at POD 14. No significant differences in total FRI scores were found between the two different pain treatment groups.

Conclusions

The present study shows a procedure-specific variation in recovery profile in the 4-week period after painful day surgery. The best predictors for short-term (POD 7) and long-term (POD 28) poor/intermediate QOR were a high postoperative pain level at POD 4 and type of surgery. Different pain treatment regimens did not result in differences in recovery profile.

Trial registration

European Union Clinical Trials Register 2015-003987-35.

Four-Week Pain Profile and Patient Non-Adherence to Pharmacological Pain Therapy After Day Surgery

Background

Nowadays, complicated and painful surgical procedures are encouraged to be carried out in an ambulatory setting.

Objectives

The current study aimed to assess 4-week postoperative pain profiles of 4 painful ambulatory surgical procedures. We analyzed the prevalence of and reasons for non-adherence and partial adherence of patients to a predefined treatment schedule after the ambulant surgery.

Methods

The current study analyzed data from a large randomized trial by evaluating the effect of postoperative pain medication on acute postoperative pain at home during the first 4 postoperative days (POD) in patients scheduled for ambulatory hemorrhoid surgery, shoulder or knee arthroscopy, and inguinal hernia repair. Postoperative pain intensity was assessed at POD 0, 1, 2, 3, 4, 7, 14, and 28 via the Numeric Rating Scale (NRS). Adherence was assessed on POD 1, 2, 3, and 4.

Results

Median average pain scores were above an NRS of 3 during the first postoperative week after shoulder arthroscopy and even above 4 during the first postoperative week after hemorrhoid surgery. 26% of patients undergoing shoulder arthroscopy and hemorrhoid surgery still had moderate pain 1 week after surgery. Median average pain scores were below an NRS of 3 during the whole study period after inguinal hernia repair and knee arthroscopy. 24.61% of patients did not use the study medication as prescribed, 5.76% of whom were non-adherent, and 18.85% were partially adherent.

Conclusions

Each type of ambulant surgery has its unique postoperative pain profile. New strategies should be developed for pain therapy at home, particularly after the ambulatory arthroscopic shoulder surgery and hemorrhoid surgery. Non-adherence is uncommon if they are provided with a multimodal analgesic home kit together with clear verbal, written instructions, and intensive follow-up.

Routine Opioid Prescriptions Are Not Necessary After Breast Excisional Biopsy or Lumpectomy Procedures

BACKGROUND

Opioid analgesics are overprescribed after surgery. In August 2018, the authors replaced routine discharge opioid prescription with a nonsteroidal anti-inflammatory drug (NSAID) for patients who had a lumpectomy or excisional biopsy (lump/ex). This study compared patient-reported post-discharge pain scores for patients treated before and after the change in routine discharge medication.

METHODS

Patients were categorized based on treatment before and after a change in discharge medication as follows: study period 1 (routine opioids), study period 2 (routine NSAID). Pain severity was assessed with an electronic survey on postoperative days (PODs) 1 to 5. Multivariable generalized estimating equations tested the association between pain severity and discharge in the first versus the second study period.

RESULTS

Lump/ex was performed for 1606 patients between December 2017 and June 2019. Of these patients, 789 (49%) reported pain scores and were analyzed (328 in study period 1, 461 in study period 2). Opioid prescription at discharge decreased from 96% in period 1 to 14% (95% confidence interval [CI], 11-18%) in period 2. Only 1% of the patients discharged with NSAID were later prescribed an opioid. The maximum reported pain score on any POD for all the patients was severe for 30 patients (3.8%), moderate for 217 patients (28%), mild for 430 patients (54%), and none for 112 patients (14%). The estimated risk for moderate or greater pain on POD 1 was 36% for period 1 and 34% for period 2. The proportion of patients reporting moderate or greater pain was nonsignificantly lower for the patients treated in period 2 (odds ratio [OR], 0.91; 95% CI 0.67-1.22; P = 0.5).

CONCLUSIONS

For patients undergoing lump/ex, a clinically meaningful difference in reported post-discharge pain scores can be excluded with a change to routine NSAID at discharge. Patients undergoing lump/ex should not be routinely discharged with opioids.

Comparison of types 2 and 3 quadratus lumborum muscle blocks : Open inguinal hernia surgery in patients with spinal anesthesia

OBJECTIVE

The efficacy of quadratus lumborum muscle block (QLB) in abdominal surgery is known; however, the efficacy of different QLB types is unclear. The objective of this study was to investigate the effects of ultrasound-guided QLB type 2 and type 3 on postoperative opioid consumption and pain scores in patients undergoing inguinal hernia surgery.

MATERIAL AND METHODS

In this study 60 patients undergoing open inguinal hernia surgery were randomly assigned to 3 groups. Group QLB2 received ultrasound-guided QLB type 2 and group QLB3 received ultrasound-guided QLB type 3 with 0.25% 20 mL bupivacaine. In the control group (group C) no intervention was performed. Postoperative analgesia was performed intravenously with 1000 mg paracetamol every 6 h and patient-controlled analgesia with fentanyl. Postoperative visual analog scale scores (VAS), opioid consumption, and first analgesic requirement time were evaluated.

RESULTS

Fentanyl consumption was significantly higher in group C compared to the other groups at all time intervals (p < 0.05). Fentanyl consumption was significantly higher in group QLB2 compared to QLB3 at the 4-8 h, 8-24 h, and total 24 h. Passive VAS 4h and 8 h, active VAS 4h, 8h, and 12 h were significantly lower in group QLB3 compared to QLB2 (p < 0.05). The first analgesic time was significantly later in group QLB2 compared to group C (280.52 ± 89.20 min and 183.75 ± 42.79 min, respectively) and even later in group QLB3 compared to the other two groups (463.42 ± 142.43 min, p < 0.05).

CONCLUSION

The use of QLB2 and QLB3 decreased postoperative opioid consumption and pain scores in patients undergoing inguinal hernia surgery. Furthermore, QLB3 provided more effective and longer lasting postoperative analgesia and lower opioid consumption compared to QLB2.

A prospective randomized controlled study of combined spinal-general anesthesia vs. general anesthesia for laparoscopic gynecological surgery: Opioid sparing properties

STUDY OBJECTIVE

We aimed to determine the magnitude of peri-operative opioid sparing effect when general anesthesia is combined with spinal analgesia for laparoscopic gynecological surgery.

DESIGN

A prospective randomized controlled study; a three-group trial with two comparisons (each intervention group to control).

SETTING

Operating room and postoperative recovery area.

PATIENTS

Patients aged between 18 and 65 years with American Society of Anesthesiologists physical status 1 or 2 who were scheduled for inpatient elective laparoscopic gynecological surgery with expected pneumoperitoneum duration of at least 20 min. Of 102 randomized patients, 99 completed the study.

INTERVENTIONS

Patients were randomized to general anesthesia alone (control group) or combined with very-low-dose (levobupivacaine 3.75 mg; sufentanil 2.5 μg) or low-dose (levobupivacaine 7.5 mg; sufentanil 2.5 μg) spinal analgesia.

MEASUREMENTS

Primary endpoints were perioperative opioid consumption and pain scores (11-point numeric rating scale) at 30 min, 1 h, 2 h, 4 h and 24 h post-surgery. Secondary endpoints were patient satisfaction with anesthetic care and participation in research, sevoflurane consumption and adverse effects.

MAIN RESULTS

Intra-operative sufentanil (median [95% CI]) consumption was 16.1 (10.5-22.6) μg/h in the control group versus 4.7 (3.2-9.2) μg/h in the very-low-dose and versus 2.9 (0.0-4.0) μg/h in the low-dose spinal analgesia groups (p < 0.001, for both comparisons). Median (95% CI) piritramide consumption at 24 h post-surgery was 7.5 (3-8) mg in the control group versus 5 (0-7.5) mg in the very-low dose spinal analgesia group (p = 0.182) and versus 2 (0-2.5) mg in the low-dose spinal analgesia group (p = 0.001). Postoperative pain scores were consistently <3 only in the low dose spinal analgesia group. Patient satisfaction with anesthetic care and participation in research was very high in all groups.

CONCLUSIONS

Low-dose spinal analgesia in combination with general anesthesia reduces peri-operative opioid consumption in laparoscopic gynecological surgery in immediate postoperative period.