Is Benadryl Habit Forming - Web sleepiness dizziness * headache low blood pressure constipation How it works benadryl is a brand (trade) name for diphenhydramine which is an antihistamine that may be. Benadryl (diphenhydramine hydrochloride) is a.
Benadryl (diphenhydramine hydrochloride) is a. Web sleepiness dizziness * headache low blood pressure constipation How it works benadryl is a brand (trade) name for diphenhydramine which is an antihistamine that may be.