Relieving symptoms such as pain, sinus congestion, runny nose, and sneezing due to colds, upper respiratory infections, and allergies. It may also used for other conditions as determined by your doctor. Benadryl Allergy/Cold is an analgesic, antihistamine, and decongestant combination. The analgesic works in the brain to help decrease pain. The antihistamine works by blocking the action of histamine, which helps reduce symptoms such as watery eyes and sneezing. The decongestant works by constricting blood vessels and reducing swelling in the nasal passages, which decreases stuffiness.
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