From the Merck Manual
The following is an excerpt from the Merck Manual, the US military's field guide to medicine:
...no physical dependence [as a result of cannabis usage]; no abstinence syndrome when the drug is discontinued. Cannabis can be used on an episodic but continuous basis without evidence of social or psychic dysfunction. In many users the term dependence with it's obvious connotations probably is misapplied.(Merck Manual of Diagnosis and Therapy, 15th edition, 1987,Robert Berkow, MD, Editor-In-Chief. Published by Merck Sharp and Dohme Research Laboratories Division of Merck and Co, Inc)
Many of the claims regarding severe biological impact are still uncertain, but some others are not. Despite the acceptance of the 'new' dangers of marijuana, there is still little evidence of biologic damage even among relatively heavy users. This is true even in the areas intensively investigated, such aspulmonary, immunologic, and reproductive function.
Marijuana used in the USA has a higher THC content than in the past. Many critics have incorporated this fact into warnings, but the chief opposition to the drug rests on a moral and political, and not a toxicological, foundation.
The article above was found on UKCIA.org
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