Medical Specialty >> Gynecology

Doctors Lounge - Gynecology Answers

Back to Gynecology Answers List

If you think you may have a medical emergency, call your doctor or 911 immediately. Doctors Lounge ( does not recommend or endorse any specific tests, physicians, products, procedures, opinions, or other information that may be mentioned on the Site.

DISCLAIMER: The information provided on is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her physician. Please read our 'Terms and Conditions of Use' carefully before using this site.

Date of last update: 10/14/2017.

Forum Name: Gynecology

Question: Amoxicillin and Birth Control; Condom broke.

 KTB358 - Fri Jan 01, 2010 1:15 pm

Hello, I had a question regarding amoxicillin and birth control. I stopped taking my amoxicillin 5 days ago. I've continued taking my birth control (Seasonale, I only get my period 4 times a year). I have been using a back up method; however, I had intercourse last night and the condom broke. How great is the chance of me being pregnant? Should I continue taking my birth control pills due to the possibility of being pregnant?

Thank you very much!
 Debbie Miller, RN - Fri Jan 01, 2010 9:38 pm

User avatar Hello,
Amoxicillin has not been shown to decrease the effectiveness of oral contraceptives so your chances of pregnancy are very slim - about 99% protection with daily use of the pill even without backup. Only Rifampin has actually been shown to interfere with birth control pills and that is rarely used, mostly in TB.

For a while it was feared that other antibiotics would have the same problem but this has been mostly proven to not be the case. However, improper use, missing a couple of pills in the month can definitely increase your risk for pregnancy. Taking as directed is the most important consideration.

Best wishes.
 KTB358 - Sat Jan 02, 2010 11:32 am

Thank you so much!
 Debbie Miller, RN - Thu Jan 21, 2010 12:02 pm

User avatar You are welcome!

| Check a doctor's response to similar questions

Are you a Doctor, Pharmacist, PA or a Nurse?

Join the Doctors Lounge online medical community

  • Editorial activities: Publish, peer review, edit online articles.

  • Ask a Doctor Teams: Respond to patient questions and discuss challenging presentations with other members.

Doctors Lounge Membership Application

Tools & Services: Follow DoctorsLounge on Twitter Follow us on Twitter | RSS News | Newsletter | Contact us