Avoid Benadryl diphenhydramine Tylenol PM
More advice and information
Avoid taking diphenhydramine/Benadryl/Tylenol PM/Advil PM and other over-the-counter sleeping pills containing diphenydramine. Diphenhydramine (brand name Benadryl) is an old antihistamine drug which is used as a sleeping pill because of its side effect of drowsiness. It can cause confusion, anxiety, constipation, fatigue, unsteadiness on your feet, blurry vision and urinary problems, especially in older people.
Additional information:
Diphenhydramine (MedlinePlus)