Missed Birth Control Pill: What to Do After Delayed Dose?

The eighth day of the pre-exposure prophylaxis (PrEP) was taken one day late, and no additional dose was taken to make up for it?

Hello doctor, I just remembered that I was supposed to start a new pack on December 12 (the eighth day), but I mistakenly noted that I would start on December 13 (the ninth day).
Now it's already the 16th, and because I misremembered the dates, I haven't taken the medication between the eighth and ninth days.
Can I just continue taking it as usual now, or is there still any efficacy left? I'm sorry for the trouble.

Yang, 20~29 year old female. Ask Date: 2023/12/16

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, please continue to take it as before, once a day.
Wishing you good health.

Reply Date: 2023/12/16

More Info

When it comes to missed doses of birth control pills, it's important to understand how to adjust your medication plan to maintain effectiveness and minimize the risk of unintended pregnancy. In your case, you intended to start a new pack of pills on December 12 but mistakenly started on December 13, and now it's December 16 without taking the missed doses. Here’s how to approach this situation:
1. Assess the Missed Dose: Since you missed taking the pill on December 12 and did not take the pills on December 13 and 14, you have missed two doses. The general guideline for combination birth control pills (which contain both estrogen and progestin) is that if you miss one pill, you should take it as soon as you remember. If you miss two or more pills, the recommendations can vary depending on how far along you are in your pill pack.

2. Current Recommendations: Since you are now on December 16, you should take the most recent missed pill immediately and continue taking the rest of the pills in the pack as scheduled. However, because you've missed two pills, it is advisable to use a backup method of contraception, such as condoms, for at least the next seven days to ensure you are protected against pregnancy.
3. Effectiveness of the Pills: The effectiveness of your birth control may be compromised due to the missed doses. Birth control pills work best when taken consistently at the same time every day. Missing doses can lead to a drop in hormone levels, which may allow ovulation to occur. Therefore, it’s crucial to follow the guidelines for missed pills and consider additional contraceptive methods during this time.

4. Next Steps: After taking the missed pills, continue with the rest of your pack as usual. If you have any concerns about potential pregnancy or if you experience any unusual symptoms, consider taking a pregnancy test after a missed period or consult your healthcare provider for further advice.

5. Future Prevention: To avoid missing doses in the future, consider setting reminders on your phone or using a pill organizer. Some people find it helpful to link taking their pill with another daily routine, such as brushing their teeth or having breakfast.

6. Consult Your Healthcare Provider: If you have any doubts or specific health concerns, it’s always best to consult your healthcare provider. They can provide personalized advice based on your health history and the specific type of birth control you are using.

In summary, since you missed two doses, take the most recent missed pill immediately, continue with your pack, and use backup contraception for the next week. Staying informed and proactive about your birth control can help you maintain its effectiveness and manage your reproductive health effectively.

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Hello, continue taking your medication daily, but the contraceptive effect may be reduced, so additional contraceptive measures should be taken. Wishing you good health.