There’s a lot going on here. First off, I completely agree with your cardiologist that the sleep aid you were taking, like ...

like most over-the-counter sleep aids, contains diphenhydramine, an antihistamine that sedates some people. The problem with this medicine is that the quality of sleep isn’t good for many people.

According to Healthline.com, "...taken for allergies and as a sleep aid, diphenhydramine (in Benadryl and Excedrin PM) also ...

Naproxen sodium 220mg, diphenhydramine HCl 25mg ... tranquilizers, or any other sleep-aid. Drowsiness, GI upset/bleed, vomit blood, feel faint, rash, redness, difficulty swallowing, symptoms ...