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Nicotine and Alcohol Use as Predictors of Recreational Cannabis Use in Adolescence: A Systematic Review and Narrative Synthesis. Subst Use Misuse 2024:1-13. [PMID: 38658323 DOI: 10.1080/10826084.2024.2342008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Background: The prevalence of recreational cannabis use among adolescents is a growing public health concern due to its link to short- and long-term adverse effects on adolescents' wellbeing, physical health, mental health, and interpersonal behaviors. Method: Five databases were searched from inception to March 17, 2023, for exposure (nicotine product, alcohol) and outcome (recreational cannabis) in adolescents (persons aged 10-19 years). The studies were screened independently by two reviewers, and the quality of the studies was assessed with Newcastle Ottawa and AXIS tool. PRISMA guidelines were employed in this review. Result: Twenty-one (21) studies involving 2,778,406 adolescents were included in the appraisal and heterogeneity was found among these studies. Ascertainment bias was commonly detected in thirteen (13) of the included studies. Among the substances examined as potential exposures, nicotine-product use emerged as a significant factor associated with future cannabis use among adolescents, particularly in mid-adolescence and in places where recreational cannabis use has been legalized. Conclusion: Current evidence suggests an association between nicotine-product use and subsequent recreational cannabis use among adolescents. However, further research is needed to establish causality between exposure to nicotine substances and the use of recreational cannabis within this age demographic. Additionally, there is a need for the development of prevention programs and targeted policies that continuously inform and update this vulnerable sub-population about the risks associated with cannabis use for leisure.
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Peri-Operative Impact of Cannabis Use in Conjunction With Elective Primary Breast Augmentation in a Private Practice. Cureus 2024; 16:e57196. [PMID: 38681441 PMCID: PMC11056190 DOI: 10.7759/cureus.57196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2024] [Indexed: 05/01/2024] Open
Abstract
Background The consumption of recreational and medicinal cannabis in the United States continues to increase. Understanding the effects of cannabis in patients undergoing elective primary breast augmentation (EPBA) is of paramount importance with the expanding rates of reported cannabis consumption. Objectives This study aims to analyze the peri-operative impact of cannabis use in conjunction with EPBA in a single-surgeon practice in San Francisco, California. Methods A retrospective chart review was performed of 134 adult female patients undergoing EPBA from August 2018 to January 2022 within a single-surgeon practice plastic surgery office. Cannabis use was self-reported as current use or former use. Cohorts were grouped as cannabis users and cannabis non-users. Results Of the 134 patient charts identified for analysis, 58 (43.3%) reported cannabis use. Cannabis users were significantly younger than cannabis non-users (26.8 years versus 31.5 years, P<0.001). No significant differences were found between groups among intra-operative blood loss, post-operative complication rates, post-operative narcotic use, or intra-operative anesthetic requirements. The incidence of adverse events, including wound breakdown, skin necrosis, and capsular contracture requiring reoperation, did not differ significantly between cannabis users and cannabis non-user groups. Ninety-six percent of patients had their implants placed subpectorally, and all procedures were done using a Keller funnel. Eighty-three percent of patients had Sientra implants, and 96% of all implants were silicone gel implants. All procedures were done under general anesthesia. Patients were followed for up to two years. Discussion This review found no significant differences in peri-operative and post-operative outcomes between cannabis users and cannabis non-users.
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Attitudes of medical students regarding legalisation of cannabis and cannabis-education. S Afr J Psychiatr 2023; 29:1948. [PMID: 38059193 PMCID: PMC10696579 DOI: 10.4102/sajpsychiatry.v29i0.1948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 09/19/2023] [Indexed: 12/08/2023] Open
Abstract
Background Recreational and medicinal use of cannabis is topical in the light of more permissive legislation regarding the substance worldwide. Aim The primary purpose of this study is to determine the attitudes that final-year medical students at the University of Pretoria (UP) hold about recreational and medicinal use of cannabis, as well as determining if they feel they are being adequately trained in this regard. Setting The research was conducted at Weskoppies Psychiatric Hospital, affiliated with the UP. Methods The study follows a cross-sectional, comparative, quantitative design. Data were collected by means of a structured questionnaire. Final-year medical students were identified as participants via a convenience sampling technique. Participation was voluntary and anonymous. Results A total of 57 valid responses were recorded. The study shows that most medical students had permissive views about cannabis and that the majority feel that they are not being adequately trained to advise patients about medical cannabis in a lecture setting (64.9%, n = 37) or clinical setting (68.4%, n = 38). Results also show that previous personal experience with cannabis led to more permissive views. Conclusion This study illustrates the need for academic research regarding medicinal cannabis but interestingly shows that medical students want more guidance from their training institution about the topic. Contribution This research shows that the conversation surrounding cannabis in medicine is continuous and universities should make a conscious effort to familiarise students with the topic.
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Maternal, Fetal and Neonatal Outcomes Related to Recreational Cannabis Use during Pregnancy: Analysis of a Real-World Clinical Data Warehouse between 2010 and 2019. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:6686. [PMID: 37681826 PMCID: PMC10487904 DOI: 10.3390/ijerph20176686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 09/09/2023]
Abstract
BACKGROUND Cannabis is the main illicit psychoactive substance used in French childbearing women and very few data are available about adverse events (AEs) related to its use during pregnancy. The aim of this study was to evaluate the association between recreational cannabis use during pregnancy and adverse outcomes from a real-world clinical data warehouse. METHODS Data from the Poitiers University Hospital warehouse were analyzed between 1 January 2010 and 31 December 2019. Logistic regression models were used to evaluate associations between outcomes in three prenatal user groups: cannabis alone ± tobacco (C ± T) (n = 123), tobacco alone (T) (n = 191) and controls (CTRL) (n = 355). RESULTS Pregnant women in the C ± T group were younger (mean age: 25.5 ± 5.7 years), had lower pre-pregnancy body mass index (22.8 ± 5.5 kg/m2), more psychiatric history (17.5%) and were more likely to benefit from universal free health-care coverage (18.2%) than those in the T and CTRL groups. Cannabis use increases the occurrence of voluntary interruption of pregnancy, at least one AE during pregnancy, at least one neonatal AE, the composite adverse pregnancy outcome over 28, prematurity and small for gestational age. CONCLUSION Given the trivialization of recreational cannabis use during pregnancy, there is an urgent need to communicate on AEs of cannabis use during pregnancy.
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Perceptions and Practices of Cannabis Use Among Emergency Department Patients. J Emerg Med 2023; 64:543-554. [PMID: 37032203 DOI: 10.1016/j.jemermed.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 02/06/2023] [Accepted: 02/17/2023] [Indexed: 04/11/2023]
Abstract
BACKGROUND Nationally, in states where cannabis has been legalized, increases in cannabis-related hospitalizations and emergency department (ED) visits have also been observed. OBJECTIVES This study aims to: 1) Describe the sociodemographic characteristics of cannabis users presenting to two academic EDs in California; 2) Assess cannabis-related behaviors; 3) Assess perceptions of cannabis; 4) Identify and describe reasons for cannabis-related ED utilization. METHODS This is a cross-sectional study of patients visiting one of two academic EDs between February 16, 2018 and November 21, 2020. Eligible participants completed a novel questionnaire developed by the authors. Basic descriptive statistics, Pearson correlation coefficients, and logistic regression were used for statistical analysis of responses. RESULTS The questionnaire was completed by 2577 patients. A quarter were categorized as Current Users (n = 628, 24.4%). Current, Regular Users were evenly divided across gender, were relatively younger (18-34 years, 48.1%), and were largely non-Hispanic Caucasian. Over half of all respondents believed that the use of cannabis was less harmful than tobacco or alcohol use (n = 1537, 59.6%). One in five Current Users (n = 123, 19.8%) reported driving while using cannabis in the past month. A small proportion (n = 24, 3.9%) of Current Users reported ever visiting the ED for a cannabis-related chief complaint. CONCLUSIONS Overall, many ED patients are currently using cannabis; few report utilizing the ED due to cannabis-related problems. Current, Irregular Users may represent the ideal target group for ED-based educational efforts aimed at improving knowledge of safe cannabis use.
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How Demographic Factors Impact Attitudes Toward the Recreational Use of Cannabis. Cureus 2023; 15:e34304. [PMID: 36860218 PMCID: PMC9970729 DOI: 10.7759/cureus.34304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/27/2023] [Indexed: 01/30/2023] Open
Abstract
While cannabis legalization in the United States has become more commonplace, differences in attitudes toward its use persist. Negative attitudes toward cannabis create barriers to care for those seeking its use for therapeutic purposes. Existing research regarding the attitudes surrounding cannabis is specific to medical cannabis (MC) use or cannabis use in general. To address this gap, the present research sought to explore the demographic factors that influence attitudes toward recreational cannabis, including gender, age, ethnicity, race, level of education, marital status, number of children, the legal status of cannabis in the state of residency, employment status, political party affiliation, political view, and religion. The Recreational Cannabis Attitudes Scale (RCAS) was used to measure participants' attitudes toward recreational cannabis. A one-way analysis of variance (ANOVA) or one-way Welch ANOVA was used to determine variations in RCAS scores between different demographic groups. Data from 645 participants indicated that gender (P = 0.039), employment status (P = 0.016), political party affiliation (P = 0.002), political view (P = 0.0005), the legal status of the state of residence (P = 0.003), religion (P = 0.0005), and experience with cannabis (P = 0.0005) had significant variations between groups regarding attitudes toward recreational cannabis. Understanding the factors that inform attitudes is critical to efforts to destigmatize cannabis use. Education about cannabis is an effective measure in reducing stigma, and paired with demographic information, advocacy efforts can be more accurately targeted.
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Clinical Relevance of Drug Interactions with Cannabis: A Systematic Review. J Clin Med 2022; 11:jcm11051154. [PMID: 35268245 PMCID: PMC8911401 DOI: 10.3390/jcm11051154] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/14/2021] [Accepted: 12/21/2021] [Indexed: 12/29/2022] Open
Abstract
Concomitant use of cannabis with other drugs may lead to cannabis–drug interactions, mainly due to the pharmacokinetic mechanism involving the family of CYP450 isoenzymes. This narrative systematic review aimed to systematize the available information regarding clinical relevance of cannabis–drug interactions. We utilized the PubMed/Medline database for this systematic review, using the terms drug interactions and cannabis, between June 2011 and June 2021. Articles with cannabis–drug interactions in humans, in English or Spanish, with full-text access were selected. Two researchers evaluated the article’s inclusion. The level of clinical relevance was determined according to the severity and probability of the interaction. Ninety-five articles were identified and twenty-six were included. Overall, 19 pairs of drug interactions with medicinal or recreational cannabis were identified in humans. According to severity and probability, 1, 2, 12, and 4 pairs of cannabis–drug interactions were classified at levels 1 (very high risk), 2 (high risk), 3 (medium risk), and 5 (without risk), respectively. Cannabis–warfarin was classified at level 1, and cannabis–buprenorphine and tacrolimus at level 2. This review provides evidence for both the low probability of the occurrence of clinically relevant drug interactions and the lack of evidence regarding cannabis–drug interactions.
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Status and Impacts of Recreational and Medicinal Cannabis Policies in Africa: A Systematic Review and Thematic Analysis of Published and "Gray" Literature. Cannabis Cannabinoid Res 2022; 7:239-261. [PMID: 34986005 DOI: 10.1089/can.2021.0110] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background: Despite cannabis's societal ubiquity, several African states remain traditional prohibitionists. However, cannabis is becoming a more explored frontier from a health, human rights, and monetary perspective. A number of African countries have taken to tailoring their policies to better engage in emerging global dialogs. Nevertheless, the focus is majorly on the crop's financial appeal with less consideration on impacts of policies. This review aimed to specifically focus on the identification of existing or pending policies, indicating national positioning in terms of recreational and medicinal cannabis use and summarizing publications addressing related impacts in Africa. Methods: We systematically searched six academic research databases (including Google Scholar), Google, country specific websites, and websites of relevant organizations. Included publications were in English and published between January 1, 2000, and November 31, 2020 (with exception granted to official legislation not in English and/or published earlier than 2000, but still in effect). Reference lists of included publications were screened for potentially relevant publications. Results were synthesized thematically and descriptively. Results: Cannabis is Africa's most consumed illegal substance, its use entrenched in social, political, historical, economic, and medicinal ties. African users constitute a third of the worldly total and cultivation is a major activity. Policies have led to prison overcrowding, accelerated environmental damage, and sourced regional instability. South Africa, Seychelles, and Ghana have decriminalized personal use with Egypt and Mozambique exploring similar legislation. Eleven countries have existing or pending medicinal cannabis-specific provisions. South Africa and Seychelles stand out as having regulations for patients to access medicinal cannabis. Other countries have made provisions geared toward creating export markets and economic diversification. Conclusion: Cannabis policy is a composite and complex issue. Official stances taken are based on long withstanding narratives and characterized by a range of contributing factors. Policy changes based on modern trends should include larger studies of previous policy impacts and future-oriented analysis of country-level goals incorporated with a greater understanding of public opinion.
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A Call for Person-Centered Language and Consistent Terminology Regarding Cannabis Use. Cannabis Cannabinoid Res 2021; 7:122-125. [PMID: 34432524 PMCID: PMC9070736 DOI: 10.1089/can.2021.0073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The increased availability of medical and recreational cannabis has facilitated a need for a change in health care practices. The language surrounding substance use disorders (SUDs) needs to be destigmatized. The necessity for utilizing "person-first" or "person-centered language" is fundamental to ensure that there is consistency among health care personnel for treating patients with an SUD and providing quality patient care. There also lies an enhanced need to more clearly define recreational cannabis use on a state versus federal level, in the workplace, and within higher education.
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Heterogeneities in administration methods among cannabis users by use purpose and state legalization status: findings from a nationally representative survey in the United States, 2020. Addiction 2021; 116:1782-1793. [PMID: 33217090 PMCID: PMC8134617 DOI: 10.1111/add.15342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/04/2020] [Accepted: 11/17/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Different cannabis administration methods have differential impacts on health. This study aimed to describe administration methods among cannabis users in the United States categorized by (1) use purpose and (2) state legalization status. DESIGN Cross-sectional, probability-based online survey in 2020. SETTING All 50 states and Washington DC in the United States. PARTICIPANTS A total of 21 903 adults (18+) were recruited from a probability-based online panel to provide nationally representative estimates. METHODS Eleven administration methods were grouped into combustion, vaporization, ingestion and topicals. Weighted prevalence was reported among (1) medical-only, recreational-only and dual-purpose users based on self-reported purposes and (2) users in states that legalized both recreational and medical cannabis (RCL states), legalized medical cannabis only and did not legalize cannabis. FINDINGS Among past-year users, the proportions of medical-only, recreational-only and dual-purpose users were 25.55, 43.81 and 30.64%, respectively. The most common primary methods were combustion (42.08%) and topicals (28.65%) for medical purposes and combustion (72.07%) and ingestion (15.05%) for recreational purposes. Dual-purpose users were more likely to report combustion and vaporization but less likely to report ingestion and topicals as primary methods for medical use than medical-only users (P < 0.001) and more likely to report combustion and topicals but less likely to report ingestion as primary methods for recreational use than recreational-only users (P < 0.041). A higher proportion of dual-purpose users (82.82%) used more than one method than medical-only (40.52%) and recreational-only users (63.91%) (P < 0.001). For both medical and recreational purposes, RCL states had the lowest rate of combustion and the highest rates of ingestion and topicals reported as primary methods (P < 0.033). The rate of using more than one administration method did not differ across states (P > 0.05). CONCLUSION Cannabis users whose purposes are medical, recreational or both tend to differ in their selected administration methods.
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Public perception of medicinal and recreational cannabis and its effect on mental health: a survey of a regional Australian town. Australas Psychiatry 2021; 29:124-128. [PMID: 33167664 DOI: 10.1177/1039856220970047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To investigate beliefs about treatment capabilities of medicinal cannabis (MC), the effect of recreational cannabis (RC) on mental health and online cannabis search trends. METHOD Participants (n = 117) completed an online survey, and search engine optimisation software was used to analyse internet search trends. RESULTS Half the participants perceived RC as harmful to mental health but were uncertain if it impairs treatment for depression or prevents anxiety. Participants believed MC can treat depression and/or anxiety. The Google keyword 'CBD oil' is most popular when seeking cannabis information and provides misinformation. CONCLUSION Australians are exposed to misinformation about MC online, explaining why participants believed that MC could treat anxiety and/or depression and why there is a reduction in the belief that RC is harmful to mental health. Health authorities should incorporate search engine optimisation strategies to provide accurate information about cannabis.
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Adverse events of recreational cannabis use reported to the French addictovigilance network (2012-2017). Br J Clin Pharmacol 2021; 87:3925-3937. [PMID: 34282851 DOI: 10.1111/bcp.14812] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 12/24/2022] Open
Abstract
AIMS To describe the adverse events (AEs) of recreational cannabis use in France between 2012 and 2017. METHODS AEs related to recreational cannabis use, alone or in combination with alcohol and/or tobacco reported to the French Addictovigilance Network were analysed (excluding cannabidiol and synthetic cannabinoids). RESULTS Reporting of AEs tripled between 2012 (n = 179, 6.3%, 95% confidence interval [CI] = 5.4-7.2) and 2017 (n = 562, 10.1%, 95% CI = 9.3-10.9), reaching 2217 cases. They concerned mainly men (76.4%) and users aged between 18 and 34 years (18-25: 30.9%; 26-34: 26.3%, range: 12-84 years). Cannabis was mainly inhaled (71.6%) and exposure was most often chronic (64.2%). Many types of AEs were reported: psychiatric (51.2%), neurological (15.6%), cardiac (7.8%) and gastrointestinal (7.7%), including unexpected AEs (n = 34, 1.1%). The most common effect was dependence, ranging from 10.1% (95% CI = 7.9-12.3) to 20.3% (95% CI = 17.3-23.2) over the study period. Cannabinoid hyperemesis syndrome (n = 87, 2.8%) emerged from 2015. Deaths accounted for 0.2% of all AEs (4 men and 3 women aged on average 35 years). A chronic pattern of cannabis use was reported in 4 of them (intracranial hypertension in the context of lung cancer, suicide, cerebral haematoma, neonatal death with concomitant chronic alcohol use), while in the other cases the toxicological analysis identified cannabis use (ruptured aneurysm and unknown aetiology). CONCLUSION This study showed a multitude of AEs related to recreational cannabis use, including unexpected AEs and deaths. It highlights the problem of dependence and the emergence of cannabinoid hyperemesis syndrome.
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Guidelines for public health and safety metrics to evaluate the potential harms and benefits of cannabis regulation in Canada. Drug Alcohol Rev 2020; 38:606-621. [PMID: 31577059 DOI: 10.1111/dar.12971] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 07/09/2019] [Accepted: 07/15/2019] [Indexed: 01/20/2023]
Abstract
ISSUES Canada recently introduced a public health-based regulatory framework for non-medical cannabis. This review sought to identify a comprehensive set of indicators to evaluate the public health and safety impact of cannabis regulation in Canada, and to explore the ways in which these indicators may be expected to change in the era of legal non-medical cannabis. APPROACH Five scientific databases were searched to compile a list of cannabis-related issues of interest to public health and safety. A set of indicators was developed based on topics and themes that emerged. Preliminary evidence from other jurisdictions in the USA and Canada that have legalised medical and/or non-medical cannabis (e.g. Colorado, Washington) was summarised for each indicator, wherever possible. KEY FINDINGS In total, 28 indicators were identified under five broad themes: public safety; cannabis use trends; other substance use trends; cardiovascular and respiratory health; and mental health and cognition. Preliminary trends from other legalised jurisdictions reveal little consensus regarding the effect of cannabis legalisation on public health and safety harms and an emerging body of evidence to support potential benefits (e.g. reductions in opioid use and overdose). IMPLICATIONS In addition to indicators of commonly discussed challenges (e.g. cannabis-related hospitalisations, cannabis-impaired driving), this review led to the recommendation of several indicators to monitor for possible public health and safety improvements. CONCLUSION In preparing a comprehensive public health and safety monitoring and evaluation system for cannabis regulation, this review underscores the importance of not only measuring the possible risks but also the potential benefits.
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Abstract
The National Academies of Sciences, Engineering, and Medicine has found substantial evidence that cannabis (plant) is effective for the treatment of chronic pain in adults, and moderate evidence that oromucosal cannabinoids (extracts, especially nabiximols) improve short-term sleep disturbances in chronic pain. The paradoxical superiority of the cannabis plant over cannabinoid molecules represents a challenge for the medical community and the established processes that define modern pharmacy. The expanding and variable legalization of cannabis in multiple states nationwide represents an additional challenge for patients and the medical community because recreational and medicinal cannabis are irresponsibly overlapped. Cannabis designed for recreational use (containing high levels of active ingredients) is increasingly available to patients with chronic pain who do not find relief with current pharmacologic entities, which exposes patients to potential harm. This article analyzes the available scientific evidence to address controversial questions that the current state of cannabis poses for health care professionals and chronic pain patients and sets the basis for a more open discussion about the role of cannabis in modern medicine for pain management. A critical discussion on these points, the legal status of cannabis, and considerations for health care providers is presented.
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In the weeds: a baseline view of cannabis use among legalizing states and their neighbours. Addiction 2016; 111:973-80. [PMID: 26687431 PMCID: PMC5216038 DOI: 10.1111/add.13282] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 09/04/2015] [Accepted: 12/09/2015] [Indexed: 11/26/2022]
Abstract
AIMS To describe patterns of cannabis use, the degree of overlap between medicinal and recreational users, and their differential use patterns, modes of consumption and sources of cannabis. DESIGN An ongoing probability-based internet panel maintained by the market research firm GfK Group. SETTING Households in Colorado, Washington, Oregon and New Mexico, USA. PARTICIPANTS A total of 2009 individuals from Washington (n = 787), Oregon (n = 506), Colorado (n = 503) and New Mexico (n = 213). Post stratification sampling weights were provided so that estimates could be made representative of the household population in each of these states. Respondents were aged between 18 and 91 years, with a mean age of 53 years. METHODS We compare patterns of cannabis consumption for medicinal and recreational users as well as simultaneous use of alcohol and cannabis. We also examine the extent to which patterns of use differ across states that chose to legalize (Washington and Colorado) and those that did not (New Mexico and Oregon). FINDINGS Rates of life-time medical cannabis use are similar in Colorado and Washington (8.8% and 8.2%) but lower in Oregon and New Mexico (6.5% and 1%). Recreational use is considerably higher than medical use across all states (41%), but highest in Oregon and Washington. Approximately 86% of people who report ever using cannabis for medicinal purposes also use it recreationally. Medical users are more likely to vaporize and consume edibles and report a higher amount (in grams) consumed, and spend more money per month than recreational users. Individuals who use cannabis do not commonly use it with alcohol, irrespective of whether they are consuming cannabis recreationally or medically. Fewer than one in five recreational users report simultaneous use of alcohol and cannabis most or all of the time and fewer than 3% of medicinal users report frequent simultaneous use of alcohol and cannabis. CONCLUSIONS In the United States, the degree of overlap between medicinal and recreational cannabis users is 86%. Medicinal and recreational cannabis users favor different modes and amounts of consumption. Only a small proportion (12%) of cannabis users usually consume cannabis and alcohol simultaneously, while concurrent use is common among recreational users.
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