Use of medical cannabis: perceptions of Israeli oncologists

Medical cannabis and its effect on oncological outcomes in patients with ovarian cancer treated with PARP inhibitors

BACKGROUND

Poly (ADP-ribose) polymerase inhibitors (PARPi) play a pivotal role in ovarian cancer management. With medical cannabis emerging as a novel component of supportive care, this study investigated the impact of medical cannabis use on oncological outcomes in patients with ovarian cancer undergoing PARPi therapy.

METHODS

The study included patients from a single institution database treated for ovarian cancer between January 2014 and January 2020 who received PARPi maintenance therapy in a first-line or recurrent disease setting after a confirmed response to platinum-based treatment. The study categorized patients as cannabis users and cannabis-naïve. Univariate and multivariate Cox regression analysis and the Kaplan-Meier method were used to assess the effects of medical cannabis use on the duration of PARPi therapy, progression-free survival, and overall survival.

RESULTS

Among the eligible patients (n=93), most were cannabis-naïve (69%, n=64) while the rest used medical cannabis (31%, n=29). Medical cannabis use rates were comparable for patients receiving PARPi therapy post-primary treatment or for recurrence (42%, n=9, vs 27%, n=20; p=0.1). Both groups exhibited similar median duration for PARPi therapy (12.1 vs 9.5 months; p=0.89) and progression-free survival (20 vs 21 months; p=0.83). Kaplan-Meier analysis detected no differences in progression-free survival associated with cannabis use. Although cannabis users had an extended overall survival compared with the cannabis-naïve group (129.3 vs 99 months; p=0.03), cannabis use was insignificant for overall survival on multivariate analysis (p=0.10). Multivariate analysis showed stage IV at diagnosis (p=0.02) to be the sole factor associated with progression-free survival (p=0.02).

CONCLUSION

Medical cannabis usage in patients receiving PARPi treatment showed no association with duration of PARPi therapy, progression-free survival, or overall survival.

Medical cannabis for refractory cancer-related pain in a specialised clinical service: a cross-sectional study

BACKGROUND AND OBJECTIVES

Cancer-related pain management in advanced stages presents a significant challenge that often requires a multidisciplinary approach. Although advancements in pharmacological and interventional therapies, a considerable number of patients still suffer from refractory pain, leading to unmet clinical needs. This study shares our experience with medical cannabis (MC) as a potential therapy for this specific population of patients with cancer-related refractory pain.

METHODS

In a cross-sectional study, 252 consecutive refractory cancer-related pain patients (mean age=61.71, SD=14.02, 47.6% males) filled out detailed self-report questionnaires. Of these, 126 patients (55%) were treated with MC and 105 patients (45%) were not.

RESULTS

Most patients received pain management from their oncologist, not a pain specialist. MC was mainly started for pain relief, sleep difficulties and anorexia. About 70% of patients reported subjective improvement from MC, with almost 40% reporting a significant improvement in coping with their illness. Side effects were generally mild, with fatigue and dizziness being the most common (21.78% and 23.46%, respectively). No patient required dedicated medical care for side effects. Of non-users, 65% had tried MC before and stopped due to lack of effectiveness or side effects (39.7% and 34.6%, respectively).

CONCLUSION

Refractory cancer pain necessitates innovative approaches. This registry highlights that MC can effectively improve symptoms in non-responsive patients, with favourable safety profiles for this vulnerable population.

Attitudes, beliefs, and knowledge regarding medical cannabis among healthcare students in the Republic of Cyprus: a cross-sectional descriptive correlational study

Background

Although international research-based literature from the last 2 decades seems to favor the use of medical cannabis (MC), there is a lack of evidence concerning healthcare students' education on MC in the Republic of Cyprus and across the world. Therefore, this study explores healthcare students' attitudes, beliefs, and knowledge regarding the use of MC. We paid special attention to differences across specific sociodemographic (gender, age, and religion status) and educational (level of study and study field) characteristics.

Methods

A descriptive cross-sectional study was conducted between November 2019 and March 2020. All active undergraduate and postgraduate healthcare students (nurses, physiotherapists, speech therapists, pharmacists, and occupational therapists; N = 900) studying in public and private universities in the Republic of Cyprus were eligible to participate (final sample: N = 819, response rate = 91%). To collect data on the attitudes, beliefs and knowledge of the participants, we used the Medical Cannabis Questionnaire (MCQ). To analyze the data, we employed the Pearson's chi-square test for group differences, in addition to assessing the descriptive and inferential statistics.

Results

Approximately 82.2% believed that MC education should be integrated into the clinical practice requirements. Statistically significant differences were observed between genders in terms of beliefs/risk associated with the use of MC, with males being more likely to believe that there are significant mental-health benefits associated with using ΜC compared to females (84.9% vs. 76.2%, p<0.05). Females were more likely than males to believe that using MC poses serious physical (76.8% vs. 60.6%, p<0.001) and mental-health (77.9% vs. 66%, p<0.001) risks. Moreover, participants who received formal education about MC during their study/training were more prepared to answer patient/client questions about ΜC (p < 0.001). In addition, participants who received formal education had more frequently friends (p < 0.001) or family members who used MC (p < 0.005).

Conclusion

This study provides useful information for curriculum development, educational changes, and policy decisions related to cannabis use for medical purposes in the Republic of Cyprus. The results showed that the majority of the healthcare students who participated in the study favored MC use. However, the participants reported a lack of knowledge and recommended additional evidence-based research and education to enhance their knowledge about MC use. Therefore, we recommend the implementation of formal education on MC among healthcare students in the Republic of Cyprus during their study and clinical training. Furthermore, it is important to include MC-related theoretical and clinical/laboratory courses during studies and clinical practice.

The use of medical cannabis concomitantly with immune checkpoint inhibitors in non-small cell lung cancer: A sigh of relief?

BACKGROUND

The use of medical cannabis has rapidly increased among cancer patients worldwide. Cannabis is often administered concomitantly with cancer medications, including immune checkpoint inhibitors (ICIs). As the cannabinoid receptors are abundantly expressed and modulate immune cells, it has been hypothesised that cannabis may attenuate the activity of ICIs. We aimed to assess the effect of cannabis on ICIs' efficiency in patients having non-small cell lung cancer (NSCLC).

METHOD

The murine model of CT26 tumour-bearing mice treated with an anti-PD-1 antibody and Δ9-tetrahydrocannabinol (THC) was used to evaluate the interaction between THC and ICIs in vivo. Correlation between use of medical cannabis and clinical outcome was evaluated in a cohort of 201 consecutive metastatic NSCLC patients treated with monotherapy pembrolizumab as a first-line treatment.

RESULTS

Median overall survival (OS) of the mice receiving a control vehicle, THC, anti-PD-1 antibody or their combination was 21, 24, 31 and 54 days, respectively (p < 0.05 for the combination treatment compared to a control vehicle), indicating that THC did not reduce the efficacy of anti-PD-1 therapy. Of 201 NSCLC patients treated with first-line monotherapy pembrolizumab for metastatic disease, 102 (50.7%) patients received licence for cannabis within the first month of treatment. Cannabis-treated patients were younger compared to the cannabis naïve patients (median age 68 versus 74, p = 0.003), with female predominance (62, 60.8% versus 34, 34.3%, p = 0.002) and with more prevailing brain metastasis (15.7% versus 5%, p = 0.013). Similar distribution of histology, smoking status, ECOG (Eastern Cooperative Oncology Group) and programmed death-ligand 1 expression was noted between the groups. Liver metastases were marginally significant (19.6% versus 10.1%, p = 0.058). The most common indication for cannabis was pain (71%) followed by loss of appetite (34.3%). Time to tumour progression was similar for cannabis-naive and cannabis-treated patients (6.1 versus 5.6 months, respectively, 95% confidence interval, 0.82 to 1.38, p = 0.386), while OS was numerically higher in the cannabis-naive group (54.9 versus 23.6 months) but did not reach statistical significance (95% confidence interval 0.99 to 2.51, p = 0.08). In multivariate analyses, we did not identify cannabis use as an independent predictor factor for mortality.

CONCLUSIONS

Preclinical and clinical data suggest no deleterious effect of cannabis on the activity of pembrolizumab as first-line monotherapy for advanced NSCLC. The differences in OS can most likely be attributed to higher disease burden and more symptomatic disease in the cannabis-treated group. These data provide reassurance regarding the absence of a deleterious effect of cannabis in this clinical setting.

Oncology Fellows' Clinical Discussions, Perceived Knowledge, and Formal Training Regarding Medical Cannabis Use: A National Survey Study

PURPOSE

Evidence suggests that patients with cancer frequently use cannabis with medicinal intent and desire clinical guidance from providers. We aimed to determine whether oncology training adequately prepares fellows to discuss medical cannabis.

METHODS

A national survey study was conducted from January to March 2021. A questionnaire assessing oncology fellows' practices regarding cannabis recommendations in cancer care and their knowledge of its effectiveness and risks compared with conventional care for cancer-related symptoms was developed and sent to 155 US-based oncology training programs to distribute to trainees.

RESULTS

Forty programs from 25 states participated; of the 462 trainees across these programs, 189 responded (response rate of 40%). Of the participants, 52% were female; 52% were White, 33% Asian, and 5% Hispanic. Fifty-seven percent reported that they discussed medical cannabis with more than five patients in the preceding year; however, only 13% felt sufficiently informed to issue cannabis-related clinical recommendations. Twenty-four percent reported having received formal training regarding medical cannabis. Oncology fellows who reported having received prior training in medical cannabis were significantly more likely to discuss cannabis with patients (risk ratio: 1.37, 95% CI 1.06 to 1.75; P = .002) and feel sufficiently informed to discuss cannabis recommendations (risk ratio: 5.06; 95% CI, 2.33 to 10.99; P < .001). Many viewed the botanical as a useful adjunctive therapy that was at least as effective as conventional treatments for anorexia/cachexia (72%), nausea/vomiting (45%), and pain (41%).

CONCLUSION

Most oncology trainees not only reported engaging in discussions regarding medical cannabis with patients but also considered themselves insufficiently informed to make cannabis-related clinical recommendations. The discrepancy between the frequency of cannabis inquiries/discussions at the patient level and comfort/knowledge at the trainee provider level represents an unmet curricular need with implications for both graduate medical education and patient care.

Attitudes, beliefs and knowledge about medical cannabis among nurses and midwives in Cyprus: a cross-sectional descriptive correlational study

BACKGROUND

There is a lack of evidence on healthcare professionals' attitudes, knowledge, and beliefs about medical cannabis in Cyprus and across the world. Therefore, the present study aimed to explore the attitudes, beliefs, and knowledge about MC use among nurses and midwives in Cyprus. Special focus was given to differences across gender, age, religion, marital status, and years of work experience.

METHODS

A descriptive, cross-sectional correlational study with internal comparisons was conducted during the 26^th Nurses and Midwives Congress in Cyprus. All active nurses and midwives (convenience sampling), from the private and national healthcare services (n = 526) were eligible to participate. To analyze the data, the Pearson Chi-square test for group differences was employed, and descriptive and inferential statistics were assessed.

RESULTS

The final sample population consisted of 232 nurses and midwives (response rate of 46.4%). In total, 67(28.9%) participants were male, and 165(71.1%) were female. Cypriot nurses and midwives reported lack of knowledge regarding the risks and benefits about MC use to patients. However, specific number of participants believed MC use was considered acceptable for the patients with persistent muscle spasms, insomnia/sleeping disorders, mental health conditions, and terminal illnesses. The vast majority of the participants believed that formal training on MC should be integrated into academic programs, and expressed the necessity of urgent training under the current curriculum, as well as, educational training programs about MC use should be integrated into the practice/clinical practice. Concerning the socio-demographic characteristics of the participants, gender had a statistically significant positive effect on participants' attitudes and beliefs about MC (p < 0.01, 26.8% vs. 13.4%). Male and unmarried participants reported higher frequency about cannabis use for recreational purposes, compared with female group (p < 0.01, 22.8%Vs 11.4%). Unmarried participants agreed that using cannabis might develop serious mental health risks compared with married participants group (p < 0.05, 77.9% vs. 66.8%).

CONCLUSIONS

The conclusions seem to be rather recommending in favor of MC use. Participants proposed enriching nursing curricula with theoretical and clinical/laboratory courses about MC during studies and clinical practice. Additional tailoring interventions should be established to decrease recreational cannabis use among Cypriot nurses and midwives.

Knowledge and attitudes of Italian medical oncologists and palliative care physicians toward medical use of cannabis in cancer care: a national survey

PURPOSE

Despite advances in supportive care, cancer-related symptoms tend to be persistent regardless of cancer type, stage of disease, or treatment received. There is an increasing prescription for complementary and alternative medicines, such as medical cannabis (MC). Knowledge and attitudes of Italian medical oncologists and palliative care physicians toward medical cannabis in cancer care remain unknown.

METHODS

We conducted a cross-sectional study to investigate the knowledge and attitude toward MC prescription among cancer care professionals in Italy. All invited participants received an email with the electronic questionnaire accessible through a direct link.

RESULTS

Among the 2616 members who received the invitation, 475 replied to the questionnaire and were considered for the survey analysis. The most prescribed formulations among those available in Italy were cannabis FM2. The most frequent clinical indications for the use of MC were pain, gastrointestinal, and mood disorders. Only 9 responders reported MC-related side effects like anxiety insomnia and muscle spasms. The question regarding the normative references for MC prescription and use in Italy had conflicting results: only 14% indicated the exact legislative reference.

CONCLUSION

Our study highlights a significant discrepancy between personal attitudes, prescription levels, and actual knowledge on MC. This represent a critical issue that should be systemically faced, building educational programs and national guidelines that sublimate personal physicians' beliefs and predispositions, resulting in a robust science-based MC practice. Only through coordinated interventions on science and health policy of MC, there will be success of safety and efficacy, ensuring the best knowledge for the best outcomes.

Pros and Cons of the Cannabinoid System in Cancer: Focus on Hematological Malignancies

The endocannabinoid system (ECS) is a composite cell-signaling system that allows endogenous cannabinoid ligands to control cell functions through the interaction with cannabinoid receptors. Modifications of the ECS might contribute to the pathogenesis of different diseases, including cancers. However, the use of these compounds as antitumor agents remains debatable. Pre-clinical experimental studies have shown that cannabinoids (CBs) might be effective for the treatment of hematological malignancies, such as leukemia and lymphoma. Specifically, CBs may activate programmed cell death mechanisms, thus blocking cancer cell growth, and may modulate both autophagy and angiogenesis. Therefore, CBs may have significant anti-tumor effects in hematologic diseases and may synergistically act with chemotherapeutic agents, possibly also reducing chemoresistance. Moreover, targeting ECS might be considered as a novel approach for the management of graft versus host disease, thus reducing some symptoms such as anorexia, cachexia, fatigue, anxiety, depression, and neuropathic pain. The aim of the present review is to collect the state of the art of CBs effects on hematological tumors, thus focusing on the essential topics that might be useful before moving into the clinical practice.

Attitudes and knowledge about medical cannabis among Israeli and American nursing students

BACKGROUND

Although medical cannabis regulations are emerging in many places around the world, a contentious conundrum remains within the medical establishment regarding the appropriate part that cannabis may have in the provision of health care. Nurses have an indispensable role in the care management of patients, and given the consideration of cannabis as a possible treatment, they are warranted to be aware of its medical properties, as well as to be able to adequately answer patient queries. Nevertheless, very little is currently known about nurses' perceptions related to medical cannabis.

OBJECTIVE

To assess attitudes, beliefs and knowledge about medical cannabis among nursing students.

METHODS

Cross-sectional study in two universities: Rutgers University (RU) in New Jersey and Ben Gurion University of the Negev (BGU) in Israel. In addition to demographic data, the survey instrument included questions about attitudes, beliefs, knowledge, and training.

RESULTS

Overall, 387 students participated, mainly females (87.8%). The vast majority from both sub-groups stated they would recommend cannabis to their patients if allowed to do so (91.2%), and were in agreement that medical cannabis is associated with significant benefits for physical (93.5%) and mental (87.8%) health. Compared to the BGU sub-group, more students from RU stated that they feel prepared to answer patient questions about medical cannabis (19.5% vs. 33.5%, respectively; χ² = 9.74, p < 0.01). While the majority of respondents stated they have not received any formal education related to medical cannabis, they expressed endorsement for such training and education.

CONCLUSIONS

In light of the expanding number of patients who use medical cannabis, this study highlights the importance of incorporating medical cannabis education for nurses in academic and clinical curricula.

Attitudes and beliefs about medical cannabis among social work students: Cross-national comparison

OBJECTIVES

Worldwide, considerable attention is being given to cannabis use for medical conditions. In the current study, we sought to assess attitudes and beliefs about MC among social work students from the US and Israel.

METHODS

We sought to assess attitudes and beliefs about MC among a sample of 417 social work students (230 from the US and 187 from Israel) who voluntarily participated in an anonymous online survey. Chi-square tests were used to analyze differences between groups.

RESULTS

Most of the US and Israeli participants (84.3 % and 96.7 %, respectively) reported no formal education about MC; and, they would recommend MC for their clients. Participants who reported any cannabis use, compared to non-users, were more likely to believe MC could benefit physical or mental health and less inclined to believe use of the substance poses serious physical or mental health risks. Secular, compared to religious students, believed it has more benefits for physical and/or mental health.

CONCLUSIONS

Our findings evidence a considerable dearth of formal evidence-based education about cannabis for medical conditions in two university-based cohorts, despite beliefs in MC as useful for physical and mental health conditions. Efforts to develop curricula and training programs for social work students are needed since they will be among key professionals addressing client needs from health care and counseling perspectives.

A Multicriteria Decision Analysis Comparing Pharmacotherapy for Chronic Neuropathic Pain, Including Cannabinoids and Cannabis-Based Medical Products

Background:

Pharmacological management of chronic neuropathic pain (CNP) still represents a major clinical challenge. Collective harnessing of both the scientific evidence base and clinical experience (of clinicians and patients) can play a key role in informing treatment pathways and contribute to the debate on specific treatments (e.g., cannabinoids). A group of expert clinicians (pain specialists and psychiatrists), scientists, and patient representatives convened to assess the relative benefit–safety balance of 12 pharmacological treatments, including orally administered cannabinoids/cannabis-based medicinal products, for the treatment of CNP in adults.

Methods:

A decision conference provided the process of creating a multicriteria decision analysis (MCDA) model, in which the group collectively scored the drugs on 17 effect criteria relevant to benefits and safety and then weighted the criteria for their clinical relevance.

Findings:

Cannabis-based medicinal products consisting of tetrahydrocannabinol/cannabidiol (THC/CBD), in a 1:1 ratio, achieved the highest overall score, 79 (out of 100), followed by CBD dominant at 75, then THC dominant at 72. Duloxetine and the gabapentinoids scored in the 60s, amitriptyline, tramadol, and ibuprofen in the 50s, methadone and oxycodone in the 40s, and morphine and fentanyl in the 30s. Sensitivity analyses showed that even if the pain reduction and quality-of-life scores for THC/CBD and THC are halved, their benefit–safety balances remain better than those of the noncannabinoid drugs.

Interpretation:

The benefit–safety profiles for cannabinoids were higher than for other commonly used medications for CNP largely because they contribute more to quality of life and have a more favorable side effect profile. The results also reflect the shortcomings of alternative pharmacological treatments with respect to safety and mitigation of neuropathic pain symptoms. Further high-quality clinical trials and systematic comprehensive capture of clinical experience with cannabinoids is warranted. These results demonstrate once again the complexity and multimodal mechanisms underlying the clinical experience and impact of chronic pain.

Medical cannabis attitudes, beliefs and knowledge among Greek-Cypriot University nursing students

OBJECTIVES

We aimed to explore the attitudes, beliefs and knowledge of nursing students about medical cannabis use in Cyprus. Special focus was given on gender differences and the year of studentship.

DESIGN

A descriptive, cross-sectional study with internal comparisons was performed on undergraduate nursing students in Cyprus. Pearson chi-square test for group differences was employed. A total of 252 questionnaires were anonymously and voluntarily completed. Descriptive and inferential statistics were assessed.

RESULTS

21 % male and 79 % female were included in the sample (response rate 62.7 %). Third year student participants reported more frequent use of cannabis for all reasons - for themselves, friends and family (p < 0.05). Furthermore, they reported more positive statements on the effectiveness of medical cannabis in treating medical conditions (p < 0.05). Moreover, female students reported more frequently the necessity of incorporating medical cannabis training into academic curricula (p < 0.05).

CONCLUSIONS

Given the reported lack of knowledge, enrichment of nursing curricula with medical cannabis related courses and lectures, both theoretical and clinical/ laboratory, are proposed. The associations of attitudes with gender and years of studentship point to the need of taking these factors into consideration for relevant education and training.

Short-Term Medical Cannabis Treatment Regimens Produced Beneficial Effects among Palliative Cancer Patients

In the last decade the use of medical cannabis (MC) for palliative cancer treatment has risen. However, the choice between products is arbitrary and most patients are using Tetrahydrocannabinol (THC)-dominant cannabis products. In this study, we aimed to assess the short-term outcomes of MC treatment prescribed by oncologists in relation to the type of cannabis they receive. A comparative analysis was used to assess the differences in treatment effectiveness and safety between THC-dominant (n = 56, 52%), cannabidiol (CBD)-dominant (n = 19, 18%), and mixed (n = 33, 30%) MC treatments. Oncology patients (n = 108) reported on multiple symptoms in baseline questionnaires, initiated MC treatment, and completed a one-month follow-up. Most parameters improved significantly from baseline, including pain intensity, affective and sensory pain, sleep quality and duration, cancer distress, and both physical and psychological symptom burden. There was no significant difference between the three MC treatments in the MC-related safety profile. Generally, there were no differences between the three MC treatments in pain intensity and in most secondary outcomes. Unexpectedly, CBD-dominant oil treatments were similar to THC-dominant treatments in their beneficial effects for most secondary outcomes. THC-dominant treatments showed significant superiority in their beneficial effect only in sleep duration compared to CBD-dominant treatments. This work provides evidence that, though patients usually consume THC-dominant products, caregivers should also consider CBD-dominant products as a useful treatment for cancer-related symptoms.

Experiences, patient interactions and knowledge regarding the use of cannabis as a medicine in a cohort of New Zealand doctors in an oncology setting

PURPOSE OF STUDY

To explore the experiences, patient interactions and knowledge regarding the use of cannabis as a medicine in New Zealand doctors in an oncology setting.

STUDY DESIGN

An observational cross-sectional survey undertaken between November 2019 and January 2020 across four secondary-care hospital oncology departments within New Zealand (Auckland, Wellington, Christchurch and Dunedin). Participants were a convenience sample of doctors; consultants, registrars, medical officers of special status and house surgeons working in oncology departments. Of 53 individuals approached, 45 participated (85% Response Rate). The primary outcome was reporteddoctor-patient interactions. Secondary outcomes included knowledge of cannabis-based products, their efficacy, prescribing regulations and educational access.

RESULTS

Of 44 doctors, 37 (84%, 95% CI: 70 to 93) reported patient requests to prescribe cannabis-based products and 43 (98%, 95% CI: 88 to 100) reported patients using illicit cannabis for medical symptoms. Primary request reasons were pain, nausea/vomiting and cancer treatment. 33/45 (73%, 95% CI: 58 to 85) cited knowledge of at least one cannabis-based product and 27/45 (60%, 95% CI: 44 to 74) indicated at least one condition that had evidence of efficacy. 36/44 (82%, 95% CI: 67 to 92) expressed future prescribing concerns but all were willing to use a cannabis-based product developed with traditional medical provenance.

CONCLUSION

In the oncology setting, patients are asking doctors about symptomatic and curative treatment with cannabis-based products. Doctors are not biased against the use of products showing medical provenance; however, NZ-specific clinical and regulatory guidelines are essential to support patient discussions and appropriate prescribing.

Preliminary assessment of medical cannabis consumption by cancer survivors

OBJECTIVES

To assess the motivation of cancer survivors to consume medical cannabis and to assess the patterns of use, perceived efficacy, as well as side and adverse effects.

METHODS

Cross-sectional survey among 190 Israeli cancer survivors who were licensed to use medical cannabis in a single institution. In addition to demographic information, the questionnaire examined patterns of use (including dosage, type of cannabis and way of administration), motivation for medical cannabis consumption, perceived efficacy, adverse and side effects, motivation for ceasing cannabis consumption, and tobacco smoking.

RESULTS

The mean monthly dosage of cannabis consumed was 42.4 grams; 95.8% of respondents reported not consuming cannabis regularly before being diagnosed with cancer; the most common way of administration was smoking, and most of the participants reported taking cannabis throughout the day. The most common symptoms for which participants took medical cannabis were pain (n = 169, 88.9%), sleeping disorder (n = 144, 75.8%) and anxiety (n = 79, 41.6%). Twenty patients (10.5%) reported on mild side (or adverse) effects.

CONCLUSIONS

This study indicates that cancer survivors may indeed consume cannabis for symptom relief, and not merely for recreational purposes. Although our findings point to perceived safety and efficacy of medical cannabis for cancer survivors, more research is needed to study the adequate role that cannabis may have for treating symptoms associated with cancer survivorship.

Medical Cannabis in Cancer Patients: A Survey of a Community Hematology Oncology Population

OBJECTIVES

Cancer patients are using medical cannabis (MC) to address symptoms; however, little data exist to guide clinicians when counseling patients. We seek to define the patterns of MC use among cancer patients, as well as efficacy and safety of MC.

MATERIALS AND METHODS

Cancer patients attending oncology office visits at Beaumont Hospital, Michigan from July to December 2018 were anonymously surveyed. The survey included data regarding demographics, diagnosis, treatment, symptom burden, and MC use. Patients who reported MC use since their cancer diagnosis completed a section on patterns of use, efficacy, and safety.

RESULTS

The response rate was 188 of 327 (57.5%). MC use was reported by 46 of 188 (24.5%). A median composite baseline symptom score ranging from 8 (best) to 32 (worst) was higher in patients using MC versus nonusers; 17.5 versus 14.4 (P<0.001). Pain was the symptom with the highest frequency of improvement 34/42 (81%), followed by appetite 34/44 (77.3%), and anxiety 32/44 (73%). MC improved the ability to tolerate treatment in 24/44 (54.5%). Cloudy thinking is the symptom that worsened the most 7/42 (16.7%), with decreased energy being experienced by 4/41 (9.8%) of the users.

CONCLUSIONS

MC was utilized by a significant portion of cancer patients in this sample, across age, diagnosis, stage, and treatment. Patients with a higher severity of baseline symptoms were more likely to use MC and report a favorable efficacy profile of MC. Minimal toxicity was reported in this cohort. Prospective studies are needed to define the efficacy and safety of MC.

Cannabis-based medicines for chronic pain management: current and future prospects

PURPOSE OF REVIEW

The medicinal use of cannabis has recently become the focus of much medical, as well as political, attention. This reality of growing use but limited evidence creates unique dilemmas for the prescribing clinician. The purpose of this review is to explore current evidence and gaps in knowledge and offer some practical considerations.

RECENT FINDINGS

There is robust preclinical data regarding the relevance of the endocannabinoid system to many pain-relevant processes. However, evidence to support cannabis-based medicines clinical use is still lacking. The best evidence to date is in managing neuropathic pain, although whether effects are clinically significant remains undetermined. However, the safety profile of cannabinoids seems favorable, especially by comparison to other medications used for pain control.

SUMMARY

The endocannabinoid system is undoubtedly a new and exciting pharmaceutical target for chronic pain management, but transition from preclinical to clinical studies has so far proved difficult. Although it is reasonable to consider cannabinoids for otherwise unresponsive pain, care should be taken in frail clinical populations. As this has become a socioeconomic and political issue in which agendas often take precedence over due diligence, there is a pressing need for unbiased empirical data and high quality evidence to better inform prescribers and patients.