Cough
"Three days of this drug--Benzoenatate--I suffered SEVERE hallucinations over the course of several days.  I stopped the drug but the hallucinations continued; I stopped all medications and my heart started to race and go into a-fib.  I ended up in the hospital where the hallucinations continued.  Only after 8 days did they go away; only after 5 days off the drug entirely did I get some relief.
It did help my cough but at what cost to me, my family, my mental health and my grasp of reality?  Not worth it!!"