Below you will find the answers to the most frequently asked questions of Arizona Allergy Associates. For more information, we’ve also provided useful links at the bottom of the page.

The more common antihistamines are listed below. This is not a complete list of all antihistamines. Many over-the-counter medications and combination drugs contain antihistamines. If you are uncertain if the medication you are taking contains an antihistamine, please do not hesitate to call our office or check with your primary care physician or local pharmacist. Please stop all antihistamines at least 5 days prior to your scheduled appointment unless these are prescribed by another physician or you have significant skin irritation or hives.

Common Antihistamines

Generic Antihistamines


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