Skip to Content
Home > Patients & Visitors > Health Library > Antihistamines for Severe Allergic Reactions
Antihistamine pills are included in allergy kits to stop or reduce itching, hives,
sneezing and wheezing, and other symptoms caused by an
allergic reaction. Examples of antihistamines include diphenhydramine (such as Benadryl) and chlorpheniramine (such as Chlorphen and Chlor-Trimeton). The antihistamine pills are not a substitute for an
Many allergic symptoms, such as hives and
wheezing, occur when a chemical called histamine is released as part of the
allergic reaction to an
allergen. Antihistamine medicines block the release of
Antihistamines can make people sleepy or make it harder
for them to concentrate. These medicines should be used carefully by people who
need to drive or operate heavy machinery. Other side effects include dry mouth,
nausea and vomiting, restlessness or irritability (especially in children),
inability to urinate, and blurred vision.
Don't give antihistamines
to your child unless you've checked with the doctor first.
January 5, 2012
E. Gregory Thompson, MD - Internal Medicine & Rohit K Katial, MD - Allergy and Immunology
How this information was developed to help you make better health decisions.
To learn more visit Healthwise.org
© 1995-2013 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.
Send Us Your Feedback
North Kansas City Hospital.