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Took plan b a day after being on antibiotics

A 28-year-old female asked:
Dr. Rixt Luikenaar
Obstetrics and Gynecology 24 years experience
Yes: It depends how long you took antibiotics and for what reason. They decrease the efficacy of seasonique. Use condoms while you take antibiotics for th... Read More
Dr. Milroy Samuel
Obstetrics and Gynecology 24 years experience
Yes: As you know there was no need for Plan B if you were taking the pill as directed. However antibiotics can reduce the effectiveness of your pill.

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A 24-year-old female asked:
Dr. Paul Garrett
Radiology 40 years experience
Low Risk of Preg.: There is a drug interaction of Zithromax and Oral contraceptives: http://www.rxlist.com/drug-interactions/azithromycin-oral-and-estradiol-norethindron... Read More
A member asked:
Dr. John Berryman
Obstetrics and Gynecology 54 years experience
"Plan B": Some antibiotics can interfere with absorption of oral birth control (Plan B for example), but not enough to reduce the hormonal effect on the uterine... Read More
A 47-year-old member asked:
Dr. Heidi Fowler
Psychiatry 25 years experience
Most are not: effected. Antibiotics which can affect Plan B include ampicillin, cotrimoxazole (in Bactrim), tetracycline, & clarithromycin.
A 20-year-old female asked:
Dr. Jeff Livingston
Obstetrics and Gynecology 22 years experience
No: You already took Plan B and it works immediately. Starting antibiotics now will not affect it.
A 17-year-old female asked:
Dr. Gurmukh Singh
Pathology 49 years experience
Effective: Plan B is very effective but not 100 %. 3 hour window will not alter the effectiveness of the treatment. If you wish to be sure, you may get an IUD pl... Read More
A 18-year-old female asked:
Dr. Susan Albow
Integrative Medicine 22 years experience
Plan B: Plan B works through delaying or preventing ovulation, by interfering with fertilization. The FDA package insert also states that Plan B may inhibit i... Read More
A member asked:
Dr. Lynne Weixel
Clinical Psychology 36 years experience
Should be fine!: There is ONLY one antibiotic that affects BC. It's for tuberculosis - Rifadin (rifampin). Otherwise ther's no impact in either direction. Best! http:/... Read More
A 22-year-old female asked:
Dr. Tanya Russo
Pediatrics 25 years experience
Yes: Antibiotics should not interfere with the efficacy of Plan B.
A member asked:
Dr. Heidi Fowler
Psychiatry 25 years experience
Agree W Dr. Khanna: This shoulde be fine. Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregn... Read More

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