First-generation antihistamines, such as chlorphenamine or promethazine, are short-acting. Side effects include drowsiness, dry mouth and blurred vision. You shouldn't drive or operate machinery ...

Thankfully, antihistamines can block this chemical release and help reduce symptoms quickly. But just like prescription drugs ...

For more severe allergy symptoms, or if you're experiencing side effects from OTC products, your doctor may prescribe an antihistamine with a stronger dosage and fewer side effects. Some ...

Antihistamines in theory could have an inhibiting effect, not necessarily that powerfully, but anything can have an impact on… One of the things I always ask a patient that comes in with sexual ...

very low amount of adverse effects or side effects. In a lot of the cases, you see combinations of antihistamines and decongestants. And decongestants will constrict the blood vessels. So people ...