Yes, and those who don't know any better say marijuana cannot cause physical dependence and withdrawal. Obviously marijuana addiction can be as difficult to recover from as any other class of addictive drug. It will probably take 3 weeks or longer for you to get through the worst of the withdrawal symptoms. I know it sounds cheesy but just try getting through one day at a time, even one hour at a time, without using...drink lots of fluids and just don't pick up. The good news is that, unless you have some serious medical problems the withdrawal will not kill you. Hang in there. Jan W.