Taking Plan B with birth control

Patient

Q: I am on falmina birth control and recently the last week have been taking an antibiotic, amoxicillin, for a gum infection. The day of taking my last antibiotic I had sex and the condom broke and he did cum inside me. Knowing that antibiotics affect birth control I took the morning after pill, plan b, 6 hours later. Will my chances of becoming pregnant be slim? Should I be worried?

Doctor

A:   Thank you for your question. Plan B is an emergency contraceptive medication that is comprised of Levonorgestrel. This functions to prevent fertilization by inhibiting ovulation. When taking within 12 hours of intercourse it is usually 95% effective at preventing pregnancy. Since you were on birth control already, it is likely that you are not ovulating anyways. We suggest that you need not worry about becoming pregnant, and wait until your period to consider any further action. If you are late, or it is missed, please see your doctor to conduct a pregnancy test.

Thank you for choosing askthedoctor.com

Related Q&A

Q: I take the Lutera birth control pill everyday at 11pm. Last night (Saturday) I took a pill at 11pm and this morning (...

Q: Hi - I'm on Alesse for birth control and since having our daughter 7 months ago, I'm quite religious with my pill but...

Q: I have had bilateral PE, DVT x2 and clot behind my eye in the past. My doctor was away and a new doctor put in the im...

Q: I have taken an i-pill on 31st October, my periods was due on 18 but I got it on 7th. But the bleeding is very low wi...

Q: I hVe taken two extra days worth of levlen ed for birth control by mistake and just wanted to no if i should wait two...

 
DOCTOR ADVISORY BOARD
218

Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician
173

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician
138

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist
98

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon
CNN
BBC
MSNBC
CBS
abcNews
FoxNews