You are right Bann, but I do have to say that I am not that dumb as to assume that there aren't other medical conditions that require some serious monitoring. I have almost 40 years of service in with the medical field. Something as simple as Benedryl should not be taken if you have to Drive, or operate any machinery. I might not be able to spell, but the one thing I can say about myself..I do know a little about Medicine.
I've been taking Benadryl 'round the clock (per the dosage on the packaging) for over a week and I've been driving, too.
BTW, it doesn't make me drowsy like it does other people. So you don't know that much about medications if you think that everyone has the same reactions to them. Tolerance levels vary widely & the way someone metabolizes medications certainly vary from person to person.
That's a moot point anyway. It matters NOT what medications the loser was taking OR his medical condition. He killed people while he was operating that vehicle. Totally his responsibility for driving under whatever condition he was in or substance he was taking.