I did smoke weed. For the past decade, in fact. And then, suddenly, my lungs/airways became sensitized to it. I have just quit ... cold turkey (a stint in the hospital for pneumonia didn't hurt, lemme tell you) ... no cravings. In fact, I don't want any! Strange, cuz I was a REAL fiend ... like the biggest pothead going. Looking back, I think weed only contributed to my manias. And ... I have this theory (based on the pot smokers I know) that many bipolar people smoke the stuff to try to emulate the high ... the great feeling of hypomania. Anyway ... me thinks no good for treating mental illness. I'm inclined to think that, if one feels the urge to self medicate, then perhaps one needs one's meds re-adjusted.