Generic name: Diphenhydramine / Pseudoephedrine
Benadryl temporarily relieves the symptoms of common cold, hay fever, and allergy, including sneezing, runny nose, and itching of the nose or throat, watery eyes, nasal and sinus congestion. It may also be used by your physician to treat certain other conditions.
It refers to the decongestant and antihistamine combination. The antihistamine blocks histamine effects, which cause allergy symptoms like sneezing, and watery eyes. The decongestant drains nasal and sinus passages, thus relieving pressure and congestion.