A member asked:

Hi doctor, does the vaginal suppository (prometrium 100mg) effects strep b results? does the vaginal suppository cause false negative for strep b? thank you, sweety?

A doctor has provided 1 answer
Dr. Deborah Ungerleider answered

Specializes in Pediatrics

Prometrium is progesterone, a hormone and does not affect Strep B testing. An antibiotic, on the other hand, can cause a test to be falsely negative, depending on the antibiotic. Please discuss this with your ob/gyn if you are still concerned.

Answered 2/21/2023

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