How to prepare for a food challenge

Antihistamines and other medications can affect the results of a food challenge, so you should check with your doctor or your child's doctor about whether and when to stop medications, including any of the following, before a food challenge.

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Antihistamines

Claritin® (loratadine)

Clarinex® (desloratadine)

Allegra® (fexofenadine)

Actifed® (brompheniramine)

Dimetapp® (brompheniramine)

Atarax® (hydroxyzine)

Vistaril® (hydroxyzine)

Benadryl® (diphenhydramine)

Chlortrimeton® (chlorpheniramine)

Phenergan® (promethazine)

Tavist® (clemastine)

Antihist® (clemastine)

Zyrtec® (cetirizine)

Actifed® (combination medicine)

Combination medicine

Aller-Chlor®

Bromfed®

Drixoral®

Dura-tab®

Novafed-A®

Sometimes antidepressants can also act as an antihistamine. Let your doctor know if you are on any antidepressants before your food challenge.