A decongestant is a medication that helps ease nasal congestion, which happens when something irritates the lining of your nose. This can result from a cold, the flu, or allergies, for example. A ...

Benadryl (diphenhydramine) is a well-known antihistamine used to treat allergy symptoms, including itchy and watery eyes, sneezing, and runny nose. It may also be used to treat colds, dry coughs, ...

Older antihistamines, such as Benadryl (diphenhydramine), are known to cause significant side effects such as drowsiness. Newer antihistamines, like Allegra, were seen to be an advance in treatment, ...

First-generation drugs, such as diphenhydramine, also work well. But they can make you very tired, so you should only use them at night before you go to sleep. Older adults should avoid them since ...