Can You Take Emergency Contraceptive Pills While on Birth Control?

Is it safe to take emergency contraception while on pre-exposure prophylaxis (PrEP)?

I am currently taking emergency contraception for the second time.
My last menstrual period started on May 30.
I began taking emergency contraception on June 3, and I had unprotected intercourse on June 10 and June 12, but there was no ejaculation inside.
Should I buy and take emergency contraception? Is there a risk of pregnancy? Please advise, thank you.

Lü zǎo, 10~19 year old female. Ask Date: 2020/06/13

Dr. Zhang Kunmin reply Obstetrics and Gynecology

Hello, the first time you take birth control pills, it is recommended to start on the first day of your menstrual cycle.
If you begin taking the pills after the second day of your period, it is advised to use additional contraceptive measures for the first seven days of taking the pills.
Combined oral contraceptives (COCs) must be taken at the same time every day; when taken correctly, they can achieve a 99% effectiveness rate in preventing pregnancy.
Thank you! Wishing you peace and health.
Dr.
Chang

Reply Date: 2020/06/13

More Info

When considering the use of emergency contraceptive pills (ECPs) while on birth control, it's essential to understand how both methods work and their effectiveness. Birth control pills are designed to prevent ovulation, thicken cervical mucus, and thin the uterine lining, thereby reducing the chances of pregnancy. However, no contraceptive method is 100% effective, and there can be instances of contraceptive failure, particularly if the birth control pills are not taken consistently or correctly.

In your case, since you have been taking birth control pills since June 3 and had unprotected intercourse on June 10 and June 12, the likelihood of pregnancy depends on several factors, including whether you took your birth control pills as directed. If you have been taking your birth control pills consistently and correctly, the chances of pregnancy are significantly reduced. However, if you missed any doses or took them irregularly, the risk of pregnancy increases.

Emergency contraceptive pills, such as Plan B or Ella, are intended to be used after unprotected intercourse to prevent pregnancy. They are most effective when taken as soon as possible after the incident, ideally within 72 hours for Plan B and up to 120 hours for Ella. If you are concerned about the possibility of pregnancy due to the unprotected intercourse, taking an ECP can provide an additional layer of protection, even if you are on birth control.
It is important to note that taking ECPs while on birth control can lead to some side effects, such as changes in your menstrual cycle, nausea, or fatigue. However, it is generally safe to take ECPs while on hormonal birth control, as they do not interfere with the effectiveness of your regular contraceptive method. In fact, many healthcare providers recommend using ECPs as a backup if there is any doubt about contraceptive effectiveness.

If you decide to take the emergency contraceptive pill, it is advisable to continue taking your regular birth control pills as scheduled. After taking the ECP, you may experience some irregularities in your menstrual cycle, such as an earlier or later period than expected. This is a common side effect and should not be a cause for alarm.

In conclusion, if you are feeling anxious about the possibility of pregnancy due to the unprotected intercourse, it is reasonable to consider taking an emergency contraceptive pill, especially if you have any doubts about the effectiveness of your birth control method during that time. Always consult with your healthcare provider for personalized advice and to discuss any concerns you may have regarding your contraceptive methods and sexual health. They can provide you with the most accurate information based on your specific situation and help you make an informed decision.

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