ACTIVE INGREDIENT: The active ingredient in Amazon Basic Care All Day Allergy is cetirizine hydrochloride, an antihistamine approved for the treatment of both indoor and outdoor allergy symptoms ...

While not an antihistamine (or technically an allergy medicine, either), many people ... more than 3,000 participants age 65 ...

Antihistamines are a broad ... should not be taking decongestants without the approval of their physician. If someone comes in presenting with allergy symptoms and they ask the pharmacist for ...

However, those with more severe allergies may find that over-the-counter options aren't strong enough, and should consult with their doctor about prescription antihistamines, or other medications ...

A hundred years after scientists first linked histamine molecules to allergies, the study of histamine pathways is in the midst of a revival, thanks in part to the discovery of a new type of receptor.

However, those with more severe allergies may find that over-the-counter options aren't strong enough, and should consult with their doctor about prescription antihistamines, or other medications ...