Quote Originally Posted by Gandalf_The_Grey
"Sick" is way too vague a term. That is the ultimate question, what consitutes withdrawal? You're angrily telling everybody to study pharmacology but I see no indication in this post that you have either (and I'm not saying you haven't necessarily). But if you actually want a pharmacological example of withdrawal, marijuana use on average causes a 5,000% increase in melatonin levels. Melatonin is a hormone your body produces to make you fall asleep, hence why you get the burnout after getting high. Some people's bodies stop producing sufficient amounts melatonin because the cannabis has been doing it for them every day for a long time. So when they quit, their body needs a few-several days to start producing adaquate quantities again. In the meantime, a withdrawal symptom you get is an inability to sleep.

Decensitization of the cannabinoid receptors may also mean you lose your apetite after quitting for the same reason, your body has depended on the drug for it.

These symptoms don't happen to most people who quit cannabis, they never happened to me, but it does happen to some.
happens to me everytime i run dry again (i rarely get it but when i do i'm pretty much high for a week straight all day)

i do have a highly addictive personality...

but i still see them as psychological, rather then physical... to me physical constitutes nasuea, pain, tremors, etc..