Patients scheduled for allergy testing must stop taking any medications that contain antihistamines for the length of time indicated below.

These medications should be stopped 7 days before testing:

  • Alavert
  • Allegra
  • Cetirizine
  • Claritin
  • Clarinex
  • Desloratadine
  • Doxepin
  • Fexofenadine
  • Levocetirizine
  • Loratadine
  • Sinequan
  • Xyzal
  • Zyrtec

These medications should be stopped 3 days before testing:

All over-the-counter cold, sleep and allergy medications, prescribed allergy medications, and certain acid-reflux medications should be stopped 3 days before testing. This includes:

  • Amitriptyline
  • Antivert
  • Astelin
  • Astepro
  • Atarax
  • Benadryl
  • Chlorphenamine
  • Cimetidine
  • Cyproheptadine
  • Diphenhydramine
  • Elavil
  • Extendryl
  • Famotidine
  • Hydroxyzine
  • Lodrane
  • Meclizine
  • Mirtazapine
  • Nalex
  • Olopatadine
  • Patanase
  • Pepcid
  • Periactin
  • Phenergan
  • Polyhistine
  • Promethazine
  • Q-Dall
  • Ranitidine
  • Remeron
  • Rynatan
  • Tagamet
  • Vistaril
  • Zantac

Stop at least 24 hours prior to the visit:

  • Singulair (montelukast)

Do Not Stop:

  • Do not stop any inhaled asthma medications or routine medications that treat blood pressure, heart problems, diabetes, etc.

Additional Information:

  • Please bring with you a complete list of all medications, as well as your pharmacy phone number and street address. We routinely send prescriptions electronically and will need your pharmacy information to ensure accuracy.
  • Please keep in mind your initial visit will take 2-3 hours. During the testing procedure, we will be using a marking pen on your back and arms. This may cause your shirt to become stained. We suggest you bring a short sleeved t-shirt to wear after your procedure.

Please note:

  • A parent/legal guardian must accompany any patients under the age of 18 at the time of an initial visit.
  • If you have any questions about what medications to stop please feel free to call our office at 314.849.8700.