U.S. doctors online nowAsk doctors free
A 45-year-old member asked:

Do antibiotics make birth control ineffective?

1 doctor answer1 doctor weighed in
Dr. Ralph Morgan Lewis
Family Medicine 38 years experience
Yes: Women on contraceptives are advised to use an alternate method of birth control whenever they take antibiotics. They should use the alternate method throughout the course of antibiotics & through the end of current pack of pills.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

Similar questions

A 34-year-old member asked:

What is it about antibiotics that causes birth control pills to be ineffective?

1 doctor answer1 doctor weighed in
Dr. Peter Karsant
Dentistry 39 years experience
Bacteria: The bacteria in your gut that make the pill effective by converting it from inactive to active form are killed off by antibiotics.
A 41-year-old member asked:

Will antibiotics make birth control not as effective?

1 doctor answer1 doctor weighed in
Dr. Peter Karsant
Dentistry 39 years experience
YES: The antibiotic disrupts the bacteria in your gut that transform the bc pill into the active form.
A 35-year-old member asked:

Can an antibiotic make birth control less effective?

1 doctor answer4 doctors weighed in
Dr. Lonna Larsh
Family Medicine 30 years experience
Yes: Most antibiotics and many other medications lower the effectiveness of birth control pills, so it is safest to also use condoms as well.
A 23-year-old member asked:

Can taking antibiotics make birth control not as effective?

1 doctor answer3 doctors weighed in
Dr. Nicolas Melgarejo
Infectious Disease 18 years experience
Yes, it depends: First of all, it depends on the birth control method you are using. In the case of oral contraceptives (ocp's) some antibiotics (azithromycin, ciprofloxacin) can increase ocp metabolism and therefore reduce their levels in the blood, increasing chances of ocp failure. You should always ask your doctor or pharmacist about all the medications you are taking before taking anything new.
VA
A 18-year-old female asked:

Can using antibiotics on birth control make you ovulate?

1 doctor answer1 doctor weighed in
Dr. Jay Park
Dr. Jay Parkanswered
Pediatrics 50 years experience
No, but..: Certain antibiotics, e.g., rifampin, enhances metabolism and can make contraceptive less effective.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated Oct 4, 2016

People also asked

Related topics

Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.