Most OTC and prescription antihistamines begin to work within 30 minutes and reach peak performance levels after one to two hours. But many doctors say we should be taking the medicine before we ...

Chlorcyclizine shows promise in reducing protoporphyrin-IX accumulation and liver damage in erythropoietic protoporphyria, ...

In people prone to allergies, exposure to pollen and allergens triggers the release of histamine—a chemical responsible for ...

Hay fever, hives and anaphylaxis are all types of allergic reactions. Many of those affected reach quickly for antihistamines to treat mild to moderate allergies (though adrenaline, not ...

Yes, allergies can make you feel tired. Fatigue is a common allergy symptom, and it’s caused by factors like inflammation or ...

Can’t stop coughing It’s a common question happening with all of the upper respiratory illness going around including colds, ...