Guide Note:
Antihistamine is an Over-the-counter medicine, available to control symptoms of allergies, including allergic rhinitis.
Fast Facts:
- Antihistamine only works if taken before contact with the allergen
- Sometimes the reaction is so severe or life threatening, additional administration of epinephrine is required
- Histamine can cause pruritus, vasodilatation, hypotension, flushing, headache
- Antihistamine helps with allergies and symptoms like hayfever or rhinitis, itchy rashes and insect bites, and sometimes used to reduce nausea and motion sickness, and to help with sleep
- Examples of over-the-counter antihistamines include chlorpheniramine (Chlor-Trimeton), diphenhydramine (Benadryl), or a newer, nonsedating ("second-generation") antihistamine such as loratadine (Claritin)
Disclaimer: The content in this page is not a substitute for professional medical advice. Please contact your doctor before taking
Antihistamine.