NEW YORK (CBSNewYork) — CBS2’s Dr. Max Gomez reported that long-term use of an antihistamine known as diphenhydramine, which is commonly sold as Benadryl and included in many over-the-counter medications for cold and allergies, may increase the risk of dementia and even cause irreparable harm.

Diphenhydramine, which also causes drowsiness, is in popular sleep aids such as Tylenol PM, Advil PM, and ZZZQuil. MORE