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Date of last update: 10/14/2017.

Forum Name: Gynecology

Question: Antibiotics affecting birth control pill effectivenss

 rs1908 - Tue Nov 29, 2005 7:37 am

I was recently prescribed Azithromycin 250 MG Dose Pack for sinusitis and bronchitis. The drug information indicates that this medicine can reduce effectiveness of combination birth control pills. I am currently taking Yasmin 28 day pack, 1 pill each morning. How long would you suggest that I use alternative methods of birth control after completing the antibiotic? I complete the 5 day dose pack 3 days ago.
 ssilve1 - Tue Nov 29, 2005 10:40 am

While it's true that some antibiotics can decrease the effectiveness of oral birth control pills, there is NO EVIDENCE that azithromycin decreases the effectiveness of Yasmin. The warning you saw was probably a more general warning about some antibiotics with some oral birth control pills.

Dr. S, PharmD
 jat2011 - Fri Dec 25, 2009 11:59 pm

I am taking Necon for birth control and I was wondering if my daily medicines could effect how the birth control works for me. I take Fursemide generic for 1 Lasix (40 mg), 1 Nexium (40 mg), 2 Lodrane (24D Capsule Sa), 1 Levothyroxine generic for Synthroid (112 mcg). Can this cause the pill to not work for me?

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