Jack Black has admitted that he kicked his smoking habit thanks to the antidepressant medicine Wellbutrin.The movie star admits he's still an occasional smoker, but he's no longer hooked on nicotine.He tells Blender magazine, "I took the Wellbutrin for two years... They say you've got to be careful quitting Wellbutrin because some people have withdrawal symptoms".Black admits he did suffer side effects as he weaned himself off the medication and explains; "It feels like your brain is sucking in on itself, like there's a small black hole in the centre of your brain galaxy. But it only lasted for a couple of weeks, and then I was back to normal".Black isn't completely smoke free, admitting to the "occasional celebratory jay (joint)," and he marked the birth of his son Thomas with a cigar.

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