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Doctor insights on: Plan B Pill Effectiveness

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Dr. Peter Baumann
851 doctors shared insights

Levonorgestrel (Definition)

Levonorgestrel is a progestin commonly used in oral contraceptives and the Mirena iud. It has ...Read more


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What is the percentage of effectiveness of Plan B pill?

Plan B: Plan b one-step can reduce your risk of pregnancy by up to 95% is used within 24 hours of sex. ...Read more

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I ejaculated inside my gf and she took the Plan B pill within an hour. We had safe sex again shortly after will this affect the effectiveness of pill?

What is "safe sex"?: If you used a condom the first time, then Plan B shouldn't be necessary. Since she took plan b, i assume you didn't use a condom. Don't forget that condoms also lower one's risk for catching/giving sexually transmitted diseases & infections in addition to lowering risk for pregnancy. Plan b is a hormonal method for emergency contraception that should not be affected by other birth control pills. ...Read more

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I had sex on bc and took a plan b after bc of worry (perfect pill user). Can I have unprotected sex again w/o bc pill effectiveness being compromised?

I had sex on bc and took a plan b after bc of worry (perfect pill user). Can I have unprotected sex again w/o bc pill effectiveness being compromised?

See below: Nothing is 100% certain, but if you take your bc pills regularly, pregnancy is unlikely. If you have concerns about taking pills on time every day, you may consider an IUD. Practice safe sex. Get HPV vaccine. See this site for safer sex info http://www.aids.org/topics/aids-factsheets/aids-background-information/what-is-aids/safer-sex-guidelines/ ...Read more

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Can plan B lose effectiveness if I finished an antibiotic 3 days ago? Still on birth control pill

Can plan B lose effectiveness if I finished an antibiotic  3 days ago? Still on birth control pill

No: In general you do not need to take Plan B if you were already on birth control. Most antibiotics will not interact with either Plan B or birth control. If you are uncertain in the future you can always ask the pharmacist or just use a condoms during those days. ...Read more

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How much time do I have to take Plan B pill after being ejectlated in at 4:00 a.M? Its 3 now do ihave time to get a pill

Yes definitely: Get it as soon as you can if you desire to not be pregnant. The effectiveness of the medication decreases with time but most doctors will recommending taking up to 72 hours after unprotected intercourse. Again, the sooner the better. ...Read more

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Does the Take Action pill have the same effects as the Plan B?

Does the Take Action pill have the same effects as the Plan B?

Yes: They both contain 1.5 mg of levonorgestrel. Plan B is the brand name most people recognize. Other versions of the same pill (such as Take Action) are considered the generic versions of Plan B. One should check a home pregnancy test 3 weeks after using one of these pills, to be sure the pill worked as expected. ...Read more

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