You are dead-set on the belief that "drugs cause violence."
So what do you want to do? Just punish the Big Pharma executives? What about the scientists lower on the totem pole? What about the marketing people? What about the physicians who prescribe the drug? Or the government officials at the CDC and FDA? (Though I want to eliminate those government agencies, to be fair.)
Do you want to outlaw only certain drugs? The SSRIs? What about the SNRI? Or tri-cyclic anti-depressants? Or the MAOIs? What about the other drugs that are psychoactive? Like certain anti-virals? Or alcohol? (Lots of crimes were committed while drunk).
What is your end goal here?