Diphenhydramine comes as a rapidly disintegrating (dissolving) tablet, a capsule, a liquid-filled capsule, a dissolving strip, powder, and a liquid to take by mouth. However, an intravenous (IV) ...

He was given prescriptions for diphenhydramine hydrochloride 50 mg orally four times daily and ranitidine hydrochloride 150 mg orally twice daily for 10 days, in addition to the prednisone regimen ...