A 39-year-old female asked:
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Will taking Benadryl (diphenhydramine) for sleep interfere with the transglutaminase IgA test to diagnose or rule out celiac disease?

1 doctor answer
Dr. Nayla Mumneh
28 years experience in Allergy and Immunology
No: It does not affect a blood test.
Answered on Mar 26, 2013
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