Some people recovering from drugs like marijuana or cocaine usually experience intense cravings. This causes them to sneak for a dose. Some are fresh from hospitals and rehab centres and on medication which is quite potent. This medication is supposed to counteract the effects of the narcotics they had been abusing. This results in complex drug interactions and hallucinations if not worse. I overheard that some of there potent psychiatric medicines find their way into the hands of drug addicts.