Anithistamines work by blocking histamine, which can cause allergy symptoms. Side effects of antihistamines may include dry mouth, drowsiness, and more. Follow the links below to find WebMD's comprehensive coverage about how antihistamines work, who should take them, and much more.
Antihistamines for Allergies
WebMD explains types of antihistamines and their use for allergies.
Decongestants and Antihistamines for the Common Cold
Learn more about decongestants and antihistamines -- and whether they'll relieve your cold symptoms.
Frequently Asked Questions About Allergy Relief
What’s the right allergy treatment for you? Get answers from the experts to common questions.
Expert Advice on Handling Your Nasal Allergies
Learn what allergies cause hay fever and how to treat them.
What Will Help My Spring Allergies?
Suffer from seasonal allergies? Here’s how to get fast, easy relief.
Blocking Allergy Symptoms: How Pretreatment Works
Tackle allergies before they start, and you could be breathing a lot easier.
How to Survive Spring Allergy Season
Get tips on how to manage your hay fever with drugs, nasal sprays, allergy shots, and more.
An Allergy-Free Vacation: It's Possible With Planning
Beaches and mountains are the best bet for allergy sufferers.
Slideshows & Images
Slideshow: How to Soothe Your Child’s Allergies
Help them fight sneezing, itching, and stuffy or runny noses that come with allergies. See solutions from natural remedies to information on medicines that can help ease your child’s allergies to pollen, dust, dander, and more.
Slideshow: Top Allergy Kit Must-Haves
Be prepared for your next allergy attack no matter where you go. See which medicines you need in your allergy kit to help relieve symptoms.
Slideshow: How to Get Allergy Relief at Home
Get tips for things you can do in your house to ease the sneezing and itchy eyes that are brought on by hay fever.