They work in a slightly different way than decongestants, which reduce the swelling of blood vessels in the nasal passages.

Antihistamines are also used by people with allergies, but know that antihistamines aren't decongestants, Rutledge said. They work by blocking the effect of histamine, which your body releases in ...

This is a natural formula, and you probably won’t see as dramatic results as you would with other medicated nasal decongestants. Allegra is an antihistamine that millions have used to relieve ...

In a lot of the cases, you see combinations of antihistamines and decongestants. And decongestants will constrict the blood vessels. So people who are expecting, rhinitis or runny nose ...

Another important consideration is the active ingredient in the drops. Antihistamines, decongestants, and mast cell stabilizers are all commonly used in allergy eye drops, and each works in a ...