Can You Take Emergency Contraceptive Pills Two Days in a Row?

Is it safe to take emergency contraception for two consecutive days?

Hello, the menstrual period was from June 2 to June 6, and the app indicates the fertile window is from June 11 to June 17.
After having intercourse on June 14, the next day I took emergency contraception, and two hours later, I had intercourse again with ejaculation inside.
Should I take emergency contraception again? What are the chances of pregnancy if I take it or not? Thank you.

Juan, 30~39 year old female. Ask Date: 2023/06/15

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, please stop taking emergency contraceptive pills.
It is recommended to use preventive measures beforehand.
Wishing you good health.

Reply Date: 2023/06/15

More Info

When it comes to emergency contraceptive pills (ECPs), it's important to understand how they work and when they should be taken. ECPs are designed to prevent pregnancy after unprotected intercourse or contraceptive failure, such as a broken condom. They are most effective when taken as soon as possible after the event, ideally within 72 hours, but some types can be effective up to 120 hours after intercourse.

In your case, you had unprotected sex on June 14 and took an emergency contraceptive pill the following day. The question arises whether you need to take another dose after having unprotected sex again shortly after taking the first pill.
The general recommendation is that if you have unprotected intercourse after taking the first dose of ECP, you should take another dose. This is because ECPs do not provide ongoing protection; they only work to prevent pregnancy from the intercourse that occurred before they were taken. Therefore, since you had another incident of unprotected sex shortly after taking the first ECP, it is advisable to take a second dose.
Regarding the effectiveness of ECPs, it is important to note that the sooner you take them after unprotected intercourse, the more effective they will be. The effectiveness can decrease significantly the longer you wait. If taken within 24 hours, ECPs can reduce the risk of pregnancy by up to 95%. If taken between 24 to 72 hours, their effectiveness drops to about 89%. After 72 hours, the effectiveness continues to decline, and they may not be effective at all after 120 hours.

In terms of the likelihood of pregnancy, if you took the ECP within the recommended time frame after the first incident of unprotected sex, your risk of pregnancy from that encounter is significantly reduced. However, since you had another unprotected encounter shortly after, the risk of pregnancy from that second encounter remains. Taking a second dose of ECP after the second incident is crucial to minimize the risk of pregnancy.

It’s also important to consider that ECPs can cause side effects, such as nausea, fatigue, and changes in your menstrual cycle. If you experience any severe side effects or if your period is more than a week late after taking the ECPs, it’s advisable to take a pregnancy test and consult with a healthcare provider.

In summary, yes, you should take another emergency contraceptive pill after the second unprotected intercourse. The effectiveness of ECPs is highest when taken as soon as possible after unprotected sex, and taking them consecutively in your situation is a prudent choice to minimize the risk of unintended pregnancy. Always consult with a healthcare provider for personalized advice and to discuss any concerns you may have regarding contraception and sexual health.

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