I just noticed that we posted replies (above) at exactly the same time and I was about to post the "great minds think alike" thing then I realized that you'd be insulted.
Here is your logic:
Psychotropic drugs can cause harm. Therefore, these drugs did cause harm.
If we apply this thinking to another area where you may be less biased we get
People eating peanuts can die. Therefore, peanuts caused the death.