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Zithromax, Zmax (azithromycin): FDA Warning – Increased Risk of Cancer Relapse With Long-Term Use After Donor Stem Cell Transplant

The antibiotic Zithromax, Zmax (azithromycin) should not be given long-term to prevent a certain inflammatory lung condition in patients with cancers of the blood or lymph nodes who undergo a donor stem cell transplant. Results of a clinical trial found an increased rate of relapse in cancers affecting the blood and lymph nodes, including death, in these patients.

Original source: https://www.fda.gov/Safety/MedWatch/SafetyInformation/SafetyAlertsforHumanMedicalProducts/ucm615738.htm

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