Medical Specialty >> Reproductive Medicine

Doctors Lounge - Reproductive Medicine Answers

Back to Reproductive Medicine 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: 10/16/2017.

Forum Name: Fertility

Question: the iud and antibiotics

 guitarchick25 - Sun Dec 09, 2007 11:30 pm

im a 25 year old female.. ive been on the iud merina for about 2 years and currently had to take antibiotics. i just read that antibiotics can make birthcontrol inefective. i had un proteced sex and im curious how big my chances are of being pregnant.. thanx for any advice given
 Debbie Miller, RN - Mon Dec 10, 2007 12:56 am

User avatar Hello,
You should have no greater risk than without the antibiotics. The primary way the IUD works is not hormonal - the hormone is an added bonus protection but IUDs without the hormone also have a very good success rate for preventing pregnancy.

Also, the problem with antibiotic use while on hormonal contraceptives has been somewhat disputed for most antibiotics. There are a few, such as Rifampin, primarily used for tuberculosis that can affect the birth control effectiveness but most have been found to not interfere. So, you really don't need to be overly alarmed - at least no more so than usual since all birth control except abstinence does have a small failure rate, especially when not used correctly. One advantage to the IUD is you don't get human error as a factor so your method works more consistently than some other methods.

Best wishes and Happy Holidays!

| 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