The duration of activity following an average dose of Diphenhydramine hydrochloride is from four to six hours. ADULTS: 25 to 50 mg three or four times daily. The nighttime sleep-aid dosage is 50 mg at bedtime.
Then, can diphenhydramine make you sleepy?
Drowsiness is one of the major side effects of some antihistamines, such as diphenhydramine (Benadryl) and doxylamine succinate (the antihistamine found in Nyquil). And because of their powerful sedating qualities, antihistamines are also the active ingredients found in numerous over-the-counter sleep aids.
How many milligrams of Benadryl is safe to take?
Typical doses for Benadryl are: For adults and children older than 12, take 1 to 2 tablets or capsules every 4 to 6 hours as needed. For children ages 6 to 11, take 1 tablet or capsule every 4 to 6 hours as needed, or 1 to 2 teaspoons of Benadryl liquid every 4 to 6 hours as needed.
What is diphenhydramine 50 mg used for?
Diphenhydramine is an antihistamine used to relieve symptoms of allergy, hay fever, and the common cold. These symptoms include rash, itching, watery eyes, itchy eyes/nose/throat, cough, runny nose, and sneezing. It is also used to prevent and treat nausea, vomiting and dizziness caused by motion sickness.