List of Culprit Drugs (according to them): Excedrin PM, Tylenol PM, Nytol, Sominex, Unisom, Benadryl, Dramamine, Paxil, Detrol, Demerol, Elavil
"You wouldn't think that taking a little pain pill would cause long term cognitive impairment, but that's just one of the commonly prescribed (or even OTC) pharmaceutical medications which were studied in a six-year test to see what kind of neurological damage was caused. Unfortunately, the research found that these pharmaceuticals, commonly taken for a variety of common medical conditions including insomnia, allergies, or incontinence, cause long-term damage to the brain. The findings point to a class of drugs called anticholinergics, which block acetylcholine, a nervous system neurotransmitter."
via List of Common Pharmaceutical Meds Which Destroy Your Brain : Natural Society.