Allergy medicines (also known as antihistamines) work by blocking the effects of histamine, a chemical our body releases when it detects something it perceives to be harmful, like an allergen or ...

Antihistamines are a type of medication that counteract histamine, a natural chemical released in the body during an allergic reaction ... the histamine reaction without affecting sleepiness.

Antihistamines are a type of medication that counteract histamine, a natural chemical released in the body during an allergic reaction ... the histamine reaction without affecting sleepiness.

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 ...

Antihistamines may help prevent allergy symptoms. But sometimes you may need to take additional medications. This is especially the case if you need to relieve sinus pressure and a congested nose.