Do all antibiotics make birth control less effective?

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Florian Sawayn asked a question: Do all antibiotics make birth control less effective?
Asked By: Florian Sawayn
Date created: Sat, Mar 20, 2021 2:54 PM
Date updated: Mon, Sep 19, 2022 4:50 PM

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Top best answers to the question «Do all antibiotics make birth control less effective»

Do antibiotics make birth control less effective?

  • According to the latest available studies, experts and women’s health providers, only one antibiotic - rifampin (Rifadin) - has been proven to make birth control less effective. Rifampin lowers the effectiveness by decreasing the birth control hormone levels (ethinyl estradiol and progestin) in women taking oral contraceptives.

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Yes and no. Antibiotics certainly have the potential to make birth control less effective. Some antibiotics can cause enzymes in the liver to break down estrogens faster, decreasing the level of estrogen in the body and reducing the effects of birth control pills.

WEDNESDAY, Aug. 19, 2020 -- Doctors have long suspected it, but a comprehensive new study provides more evidence that antibiotics can reduce the effectiveness of birth control pills. That means women who are using both types of drugs at once should take extra precautions to avoid an unintended pregnancy, the study's British authors say.

Is it true that the birth control will stop working? and if it does how long after I stop taking the antibiotics will the birth control work again? No. You can take the antibiotic you’ve been prescribed for your kidney infection and your birth control pill will keep protecting you. Only one antibiotic is known to make the pill less effective.

Most antibiotics do not affect contraception. It's now thought that the only types of antibiotic that interact with hormonal contraception and make it less effective are rifampicin-like antibiotics. These can be used to treat or prevent diseases, including tuberculosis and meningitis.

Antibiotics like amoxicillin won’t change the effectiveness of your birth control. The antibiotic rifampin (also known as Rifadin and Rimactane) is the only exception — it can lower the effectiveness of the pill, patch, and ring.

Like all drugs, oral contraceptives are not 100% effective with the failure rate in the typical United States population reported to be as high as 3%. It is thus possible that the case reports of unintended pregnancies during antibiotic therapy may simply represent the normal failure rate of these drugs.

Although not all antibiotics will make your hormonal birth control ineffective, there are certain ones to keep an eye out for. Dr. Chirag Shah, an emergency medical physician, told INSIDER that rifampin, a medication commonly used in the management of tuberculosis, "interacts significantly with oral contraceptives and, in some cases, can render birth control ineffective."

Finally, numerous anti-seizure drugs can affect the way your body metabolizes the hormones in birth control, making the pill less effective. These include: Oxcarbazepine

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