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Cannabisrauchen in Maßen könnte sich auf Spermien auswirken

Boston – Ein geringer Cannabiskonsum könnte sowohl eine höhere Spermienzahl zufolge haben als auch höhere Testosteronwerte. Das ergab eine Beobachtungsstudie mit fast 700 Männern, die in Human Reproduction veröffentlicht wurde (2019; doi: 10.1093/humrep/dez002). Einen kausalen Zusammenhang konnten die Studienautoren allerdings nicht nachweisen. (aerzteblatt.de, 07.02.2019)


Pharmacotherapies for cannabis dependence.

Nielsen S, Gowing L, Sabioni P, Le Foll B.

Cochrane Database Syst Rev. 2019 Jan 28;1:CD008940. doi: 10.1002/14651858.CD008940.pub3.



WHO. WHO Expert Committee on Drug Dependence -- Critical Review: Cannabis and cannabis resin

WHO 2018


New trends in cannabis potency in USA and Europe during the last decade (2008-2017).

Chandra S, Radwan MM, Majumdar CG, Church JC, Freeman TP, ElSohly MA.

Eur Arch Psychiatry Clin Neurosci. 2019 Jan 22. doi: 10.1007/s00406-019-00983-5.



How long does cannabis impairment last? Researchers are starting to find out

If rules about cannabis consumption for Canadian police are any measure, we know precious little about how long cannabis impairment lasts. The wait time for police to show up for work after consumption ranges anywhere from the next day to 28 days, with some forces prohibiting members from using the drug altogether. 

University of Alberta psychiatrist Scot Purdon agrees the science is scant on impairment beyond the first few hours. (medicalxpress.com, USA, 18.10.2018)


Observations: Is Cannabis Good or Bad for Mental Health? The evidence says it can go either way.

(...) The reality is that cannabis cannot be pigeonholed as strictly helpful or harmful. Instead, meaningful discussion about its potential benefits and harms requires careful and nuanced consideration of the scientific literature, coupled with a humble attitude. As delineated in a recent and thorough review paper in the International Review of Psychiatry,the relationship between cannabis and mental health is especially complicated. (Scientific American, 17.01.2019)


Cannabis use and driving-related performance in young recreational users: a within-subject randomized clinical trial 

Tatiana Ogourtsova, Maja Kalaba, Isabelle Gelinas, Nicol Korner-Bitensky and Mark A. Ware

Canadian Medical Association Journal- CMAJ Open - cmajo 6:E453-E462; published online October 14, 2018, doi:10.9778/cmajo.20180164


Increasing potency and price of cannabis in Europe, 2006-2016

Tom P. Freeman, Teodora Groshkova, Andrew Cunningham, Roumen Sedefov, Paul Griffiths, Michael T. Lynksey

Addiction, First published: 29 December 2018, doi.org/10.1111/add.14525


Editorial: Watching Canada’s experiment with legal cannabis

Diane Kelsall

CMAJ October 15, 2018 190 (41) E1218; DOI: https://doi.org/10.1503/cmaj.181287 

On Oct. 17, 2018, the government of Canada will launch a national, uncontrolled experiment in which the profits of cannabis producers and tax revenues are squarely pitched against the health of Canadians. When Bill C-45 comes into force in mid-October, access to recreational marijuana will be legal 1 making Canada one of a handful of countries to legalize recreational use of the drug. Given the known and unknown health hazards of cannabis,2,3 any increase in use of recreational cannabis after legalization, whether by adults or youth, should be viewed as a failure of this legislation. The government of Canada should commit to amending the act if cannabis use rises.


Studie Cannabis-Produkte werden immer stärker 

Der THC-Gehalt von Haschisch und Marihuana hat in den letzten Jahren drastisch zugenommen - bei gleichbleibendem Preis. Das birgt erhebliche gesundheitliche Risiken. (Spiegel online, 30.12.2018)


A new ingredient - Spice is throwing up problems not seen with other drugs

Public services grapple with a street drug that is like no other. (The Economist, 27.09.2018)


WHO: Die Übersicht zu Cannabis bleibt unter Verschluss 

Die mit Spannung für den 7. Dezember erwartete Veröffentlichung der Ergebnisse der zweijährigen wissenschaftlichen Bewertung von Cannabis, das „Critical Review on Cannabis“, im Rahmen des CND-Treffens (Commission on Narcotic Drugs) in Wien, fand nicht statt. Die letzte Einschätzung der WHO aus dem Jahr 1954 hatte das weltweite Verbot im Rahmen des UNO-Drogenkontrollvertrags gestärkt.

Als es an der Zeit war, die Ergebnisse im überfüllten Saal zugänglich zu machen, waren alle verblüfft, zu erleben, wie der Sprecher der WHO bekannt gab, dass das Ergebnis zu Cannabis vertraulich bleibt, und nicht einmal einen weiteren Termin für die Veröffentlichung nannte. Sprecher von Nicht-Regierungs-Organisationen kritisierten, dass die WHO sich nicht an ihre eigenen Regeln und Richtlinien halte. (IACM, 22.12.2018)


Cannabis Communication Guide for Youth Allies. 

Kanada. Fleming, K., & McKiernan, A. (2018). 

Ottawa, Ont.: Canadian Centre on Substance Use and Addiction. ISBN: 978-1-77178-505-1


WHO. „...the outcome on Cannabis was kept confidential“

Vienna, UN headquarters. World Health Organization (WHO) much anticipated release of findings of two year scientific assessment of Cannabis leaves observers stunned and upset.The last assessment by WHO in 1954 fuelled global prohibition under the UN drug control Treaty framework. (FAAAT think & do tank, 07.12.2018)


Exploring cannabis concentrates on the legal market: User profiles, product strength, and health-related outcomes

L.Cinnamon BidwelllSophie L.York WilliamsRaeghan MuellerAngela D.BryanKent E.Hutchison

Addictive Behaviors Reports, In Press, Accepted Manuscript, Available online 17 August 2018, doi.org/10.1016/j.abrep.2018.08.004


Efficacy and safety of a fatty acid amide hydrolase inhibitor (PF-04457845) in the treatment of cannabis withdrawal and dependence in men: a double-blind, placebo-controlled, parallel group, phase 2a single-site randomised controlled trial

D'Souza, Deepak Cyril et al.

The Lancet Psychiatry , Volume 0 , Issue 0 , online first, Published:December 06, 2018, doi.org/10.1016/S2215-0366(18)30427-9


USA. America’s Invisible Pot Addicts

More and more Americans are reporting near-constant cannabis use, as legalization forges ahead. (The Atlantic, USA, 20.08.2018)


The Crimson Digest (Volume 1): Briefing on the international scientific assessment of cannabis: Processes, stakeholders and history

FAAAT, 2018


Non-medical Cannabis Self-Exposure as a Dimensional Predictor of Opioid Dependence Diagnosis: A Propensity Score Matched Analysis.

Butelman ER, Maremmani AGI, Bacciardi S, Chen CY, Correa da Rosa J, Kreek MJ.

Front Psychiatry. 2018 Jun 27;9:283. doi: 10.3389/fpsyt.2018.00283. 


Cannabis Systematics at the Levels of Family, Genus, and Species.

McPartland JM.

Cannabis Cannabinoid Res. 2018 Oct 1;3(1):203-212. doi: 10.1089/can.2018.0039. 


Reduced Incidence and Better Liver Disease Outcomes among Chronic HCV Infected Patients Who Consume Cannabis.

Adejumo AC, Adegbala OM, Adejumo KL, Bukong TN.

Can J Gastroenterol Hepatol. 2018 Sep 23;2018:9430953. doi: 10.1155/2018/9430953.


DSM-5 cannabis withdrawal syndrome: Demographic and clinical correlates in U.S. adults.

Livne O, Shmulewitz D, Lev-Ran S, Hasin DS.

Drug Alcohol Depend. 2018 Oct 16. pii: S0376-8716(18)30714-2. doi: 10.1016/j.drugalcdep.2018.09.005. 



WHO. Fortieth meeting of the Expert Committee on Drug Dependence dedicated to carrying out pre-reviews of cannabis and cannabis-related substances

The Fortieth meeting of the Expert Committee on Drug Dependence (ECDD) was held in Geneva, Switzerland, 4-7 June 2018. 
The 40th ECDD was a specially convened session dedicated to carrying out pre-reviews of cannabis and cannabis-related substances: 

- Cannabis plant and cannabis resin

- Extracts and tinctures of cannabis*

- Delta-9-tetrahydrocannabinol (THC)

- Isomers of THC


A Survey of Cannabis Acute Effects and Withdrawal Symptoms: Differential Responses Across User Types and Age.

Sexton M, Cuttler C, Mischley LK.

J Altern Complement Med. 2018 Oct 31. doi: 10.1089/acm.2018.0319. 


Effects of cannabis on eyewitness memory: A field study.

Vredeveldt A, Charman SD, den Blanken A, Hooydonk M. 

Appl Cognit Psychol. 2018;32:420–428. doi.org/10.1002/acp.3414


Studie: Cannabisabstinenz verbessert verbales Gedächtnis von Jugendlichen

Boston – Der Verzicht auf einen Cannabiskonsum hat in einer randomisierten Studie das verbale Gedächtnis von Jugendlichen verbessert. Die Erholung trat laut der Publikation im Journal of Clinical Psychiatry(2018; 79: 17m11977) bereits in der ersten Woche der Abstinenz auf. (aerzteblatt.de, 31.10.2018)


Who seeks treatment for cannabis use? Registered characteristics and physical, psychological and psychosocial problem indicators among cannabis patients and matched controls.

Christiansen SG, Bretteville-Jensen AL.

BMC Public Health. 2018 Jun 22;18(1):780. doi: 10.1186/s12889-018-5625-0.


People who gave up smoking cannabis had a memory boost within a week

Cannabis use really does weaken your memory. People who gave up smoking the drug saw their cognitive abilities improve after just a week. (New Scientist, UK, 30.10.2018)


Niederlande. THC-concentraties in wiet, nederwiet en hasj in Nederlandse coffeeshops (2016-2017)

Sander Rigter en Raymond Niesink

Trimbos-instituut, Utrecht, Drugs Informatie en Monitoring Systeem (DIMS) Programma, Drug Monitoring, September, 2017


Driving While Stoned: Issues and Policy Options

Mark A.R. Kleiman / Tyler Jones / Celeste J. Miller / Ross Halperin

Journal of Drug Policy Analysis, Online erschienen: 24.10.2018, doi.org/10.1515/jdpa-2018-0004