I just did a bigger reply that wasn't there after I hit the back-button because the server was busy.

But, this one answers your question.

Marijuana produces no withdrawal symptoms no matter how heavy it is used. It is habit forming (psychologically addictive), but not physically addictive. The majority of people who quit marijuana don't even have to think twice about it. Comparing marijuana to addictive drugs is really quite silly.

For a drug to be physically addictive, it must be reinforcing, produce withdrawal symptoms, and produce tolerance. Marijuana is reinforcing, because it feels good, but it does not do the other two things. Caffeine, nicotine and alcohol are all physically addictive.

http://www.erowid.org/plants/cannabi...aq1.shtml#3-20 (top of page)

Oh, and mice and rats won't self-administer THC, also.
beachguy in thongs Reviewed by beachguy in thongs on . Tolerance Questions Hey all I'm just your normal pot-smoking teenager. I just had a few questions. Lately, the past two months I've been smoking daily. It was usually just once a day although some days I would smoke all day or something haha It all depends. When does tolerance start to kick in? I mean obviously it has, but within the last week and especially the last weekend, it has gotten real weak. I've been smoking the same weed pretty much, but it just seems like I get a nice buzz then it all goes away before Rating: 5