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Do antibiotics interefere with the mirena iud?
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mygirlsrmyworld2515 posted:
I was just wondering if antibiotics interfere with the mirena iud? I had surgery August 13th and they gave me antibiotics (IV) because of a heart condition I have.
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georgiagail responded:
Although there is often concern regarding antibiotics and hormone containing birth control agents, in reality very few antibiotics have been shown to decrease the effectiveness of these agents. One of them, Rifampin, is typically used to treat tuberculosis and would not be used to prevent an infection following surgery or (as in your case) as a preventive measure with surgical procedures.

Gail
 
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Jane Harrison Hohner, RN, RNP responded:
Dear mygirlsmyworld: Gail is correct (as usual). I wanted to add that the Mirena works by two mechanisms. First, the mechanical presence of the IUD. Antibiotics wouldn't impact that factor. Second, the synthetic progesterone which keeps the lining of your uterus very thin add extra contraceptive protection. Unlike birth control pills/patches/rings the synthetic progesterone is in direct contact with its target tissue so systemic medications are even less likely to change hormone levels as they pass through the blood stream and liver.

Thanks for asking an important question which can be of help to others.

Yours,
Jane


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