Pet Allergy & Dermatology Specialists

4580 Crackersport Rd
Allentown, PA 18104



Drug Withdrawal for Allergy Testing


Recommended Drug Withdrawal Times Prior to Intradermal Allergy Testing


60 Days

Long-acting steroid (cortisone) injections, including Depo-Medrol (methylprednisolone), and Vetalog (triamcinolone)

30 Days

Oral steroids including prednisone/prednisolone, Temaril-P, Medrol, dexamethasone and triamcinolone

14 Days

Topical steroids including ear medications with steroids (Otomax, Mometamax, Tresaderm, Synotic, Panalog); other topical steroids including hydrocortisone, Genesis spray (triamcinolone), Gentocin spray and others; eye medications containing steroids

14 Days

Antihistamines:  Benadryl (diphenhydramine), Chlortrimeton (chlorpheniramine), Atarax (hydroxyzine), Zyrtec, Claritin, Tavist (clemastine).  Elavil (amitriptyline) and Clomicalm (clomipramine) are antihistamines but should not be suddenly discontinued without discussing with your veterinarian. 


Apoquel should ideally be stopped 7 days prior to allergy testing

0 Days

Currently, no withdrawl time is required for Atopica (cyclosporine), antibiotics, antifungals, Cytopoint or shampoos