Is Zithromax gluten-free?

Melinda Dennis MS, RDN, LDN
Q: Is Zithromax gluten-free? I can't get a clear answer on this. lists it as gluten-free but my pharmacist says there may be small amounts or traces of gluten in suspension.


I contacted Dr. Steve Plogsted, expert celiac pharmacist and owner of the website, to answer this question. Per Dr. Plogsted, “none of the azitho brands contain even the slightest amount of gluten. Tell your readers that although none of them contains gluten, the drug will cause either diarrhea or intestinal upset because it's a characteristic of the drug itself.” You are always welcome to email Dr. Plogsted directly at

Reviewed October 3, 2022.

Note: Melinda Dennis and Delete the Wheat, LLC do not have any financial interest in the resources listed.

Note: This information is provided by NCA and Melinda Dennis, NCA's Senior Consulting Dietitian. This information is meant for educational purposes and is not intended to substitute for personalized medical advice or replace any medical advice provided directly to you by your health care provider. This information can be printed and used in consultation with your physician or dietitian. No liability is assumed by NCA, Ms. Dennis or her nutrition consulting service Delete the Wheat, LLC. by providing this information.

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About Melinda Dennis MS, RDN, LDN

Melinda Dennis, Senior Nutrition Consultant for NCA, is an expert celiac dietitian and and Nutrition Coordinator for the Celiac Center at Beth Israel Deaconess Medical Center in Boston, MA. Diagnosed with celiac disease in 1990, she specializes in the nutritional treatment of patients with celiac disease and gluten-related disorders.

Melinda lectures internationally and has written extensively on the nutritional management of celiac disease including the award-winning book Real Life with Celiac Disease. Melinda was the original founder of NCA in 1993 and so it is only fitting that she comes back to us in this capacity. We are truly honored to have her on our team.