Guidelines for Resuming Birth Control Pills After a Missed Dose - Obstetrics and Gynecology

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Emergency contraceptive pills


Hello Doctor, I have been continuously taking oral contraceptive pills (OCPs) for over six months, and the brand I am using is Alesse.
My last menstrual period started on October 16, and my cycles are generally quite regular, occurring every 28-30 days.
I started this month's pack on October 18, but I lost the remaining pills around November 1.
As of today, November 6, I have not taken any additional pills (and I have not experienced any bleeding yet).
I am unsure when would be the best time to start the next pack.

M, 20~29 year old female. Ask Date: 2019/11/06

Dr. Huang Jianzhong reply Obstetrics and Gynecology


I have been continuously taking the oral contraceptive pill (for over six months), currently using the brand Aisilian.
My last menstrual period started on October 16, and my cycles are generally quite regular, occurring every 28-30 days.
I began taking this month's contraceptive pills on October 18, but I lost the remaining pills around November 1 and have not taken any since then (I have not experienced any bleeding up to today, November 6).
I am unsure when it would be best to start the next pack.
The recommendation is to wait for my period to start before taking the next pack and to use condoms for contraception during this time.

Reply Date: 2019/11/06

More Info


When it comes to resuming birth control pills after a missed dose, there are several important guidelines to follow to ensure continued contraceptive effectiveness and to minimize the risk of unintended pregnancy.
First and foremost, it’s crucial to understand the specific instructions provided by the manufacturer of the birth control pill you are using. In your case, you mentioned that you have been taking "Aisilian" (a brand of oral contraceptive) for over six months, and you missed doses starting from November 1st. Here’s a general approach to follow based on common guidelines for missed doses:
1. Assess the Timing of the Missed Dose: If you missed one pill, it is typically recommended to take the missed pill as soon as you remember. If you remember on the same day, take it immediately, even if it means taking two pills in one day (the missed pill and the scheduled pill). If you remember the next day, take the missed pill as soon as possible and continue with your regular schedule.

2. Multiple Missed Pills: If you have missed two or more pills, the guidelines can vary. Generally, if you missed two pills in the first two weeks of your pack, you should take the most recent missed pill as soon as you remember and discard the others. Then, continue taking the remaining pills as scheduled. However, you should use backup contraception (like condoms) for at least seven days after missing multiple pills.

3. What to Do Next: Since you mentioned that you lost the remaining pills and have not taken any since November 1st, it is advisable to start a new pack of pills as soon as possible. Begin taking the new pack according to the instructions, and use backup contraception for at least seven days to ensure you are protected against pregnancy.

4. Monitor for Withdrawal Bleeding: Since you have not experienced any bleeding yet, it’s important to note that missing pills can sometimes delay your withdrawal bleeding. If you do not get your period within a week after starting the new pack, consider taking a pregnancy test to rule out pregnancy.

5. Consult Your Healthcare Provider: Given that you have been on birth control for an extended period and have missed doses, it would be wise to consult your healthcare provider. They can provide personalized advice based on your health history and the specific formulation of the pill you are using. They may also discuss alternative contraceptive methods or address any concerns you may have about missed doses.

6. Considerations for Future Doses: To avoid missing doses in the future, consider setting reminders on your phone or using a pill organizer. Consistency is key with oral contraceptives, and taking them at the same time each day can help maintain their effectiveness.

In summary, if you have missed doses of your birth control pills, take the missed pills as soon as you remember, start a new pack if necessary, and use backup contraception for at least seven days. Always consult your healthcare provider for tailored advice and to address any concerns regarding missed doses or contraceptive effectiveness.

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