Ellis and colleagues
The urinary excretion patterns of 86 chronic cannabis users were examined after their last cannabis use by two common screening methods (...). We demonstrated that under very strictly supervised abstinence, chronic users can have positive results for cannabinoids in urine (...) for as many as 46 consecutive days from admission, and can take as many as 77 days to drop below the cut-off calibrator for 10 consecutive days. For all subjects, the mean excretion time was 27 days (...). Demographic, body type, and drug history variables proved to be only moderate predictors of excretion patterns."
Ellis GM Jr Mann MA Judson BA Schramm NT Tashchian A. Excretion patterns of cannabinoid metabolites after last use in a group of chronic users. Clin Pharmacol Ther 1985;38(5):572-578.
Rolf Aderjahn
Excretion of THC and its metabolites in chronic users can be found in the range of 4-6 weeks. In the literature a 10 year long intensive cannabis use was reported to result in detection of use after 77 days with common tests. With single or occasional use excretion in urine is rarely short (some hours), usually it lasts for 3-5 days.
Aderjahn R. Toxikologischer Cannabisnachweis [Toxicological cannabis detection]. In: In: Berghaus G, Krüger HP, eds. Cannabis im Straßenverkehr [Cannabis in road traffic]. Stuttgart: Gustav Fischer, 1998.
ev0l said:Ok, this info is from my psyc. teacher at a college I attend, so its valitidy is up to you. He claimed during a discussion on various drugs that weed has a very unique tendancy to cause a reverse tolerance in habitual users. Basically after long use, not sure of the time frame, maybe years, but anyways it eventually takes less and less to get high, you just can't get as high as a noob would. Something to do i believe w/ the fat solubility and extreme habitual users. I've noticed it at around 1.5 years, now been 3 and i was curious to know if anyone else had the same experiece?
yimmy12 said:I have no idea, but I definitely agree with reverse tolerance. I mean everyone has heard of some people not getting high their first time. It could be because there is already thc in your system from before and plus you are just better at smoking. Sorry if this doesn't make sense I just smoked 2 bowls of some blueberry with a friend and I'm fried.
ev0l said:i'd like to find out what causes it tho, because to my knowledge it is unique as far as drugs go.
alien8ed said:The one year mark is a point when many people invest in more efficient means of getting high, and better sources. It could be that you needed less because you were no longer smoking mexican brick out of j's, but dankiest of the dank out of bongs.
(Or you could simply be smoking more potent weed).