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Is the dosage effective after Plan B fell into my drink?

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Ever since i've gotten my period when i was 12, it's been very irregular. I am now19 and only get my period a fee times a year. On Sunday, my boyfriend and i had a mishap and it lead me to get Plan B one step which i took 3 hours after the incident. Not only did this happen but the pill fell into my drink before i took it, but i was able to get it out before it dissolved. Would the dosage still be effective? What are my chances of ovulating and getting pregnant?

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Category: Family Physician-GP
 32 Doctors Online

The oral contraceptive pill, which you have taken, is usually effective up to 72 hours as it prevents ovulation and reduces the chances of the sperm to fertilize the egg. Since you have taken the pill after 3 hours, it should be fine. However there may be a small chance of pregnancy due to certain unpredictable factors like delay in ovulation, sperms staying alive for 3- 4 days. Ovulation is the release of the ovum (egg) from the ovarian follicle. The sperm on the other hand is alive for 1-2 days but in the right environment it can sustain till 3- 4 days. Once the sperm and the ovum are fertilized, the implantation occurs after 6- 12 days. If not fertilized, the ovum degenerates within 24 hours.

In regard to your question on getting pregnant, I would suggest you to use an emergency pill like Ella which has 120 + hours action. You can take start it immediately. This should act as double protection to prevent pregnancy. Hope this helps.

Dr. John Monheit
Category: Family Physician-GP
Residecny: North Colorado Family Medicine
Medical School: The Chicago Medical Center
Dr. John Monheit and 4 other Medical Specialists are ready to help you

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