They have few side effects and can really improve your stuffy nose. Like antihistamines, doctors usually recommend that you start them a few weeks before your allergy season. There’s also a ...

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 ...

It is further common practice to combine oral corticosteroids with antihistamines in the treatment of acute exacerbations of allergic rhinitis. The aim of this study was to investigate the effect ...