Should You Continue Taking Birth Control After Your Period Starts? - Obstetrics and Gynecology

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If you take the placebo pill of your birth control and your period starts, should you continue taking the pills?


I would like to ask, I started taking the first pack of Yaz 24+4 on the second day of my period, January 21, and finished all the active pills by February 13.
Then, on February 14, when I took the first white inactive pill, my period started.
Should I finish the remaining three white inactive pills before starting the second pack of Yaz, or can I skip them and directly start with the first pink active pill of the second pack? Additionally, I had a cold on February 7 and took cold medication and antibiotics; will this have any impact?

F, 10~19 year old female. Ask Date: 2023/02/15

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, you can stop taking the remaining pills once your period starts.
Begin taking a new pack of contraceptive pills on the fifth day of your period.
Wishing you good health!

Reply Date: 2023/02/15

More Info


When it comes to taking birth control pills, particularly the combination pill like Yaz (which is what you referred to as 悅姿), it’s important to understand how the cycle works and what to do when your period starts.
In your case, you started taking Yaz on the second day of your period (January 21) and continued until February 13, when you finished the active pills. On February 14, you began taking the inactive (placebo) pills, and that’s when your period started.
The general guideline for taking combination birth control pills is that you should continue taking all the pills in the pack, including the inactive ones, even if your period starts. This is because the inactive pills are included to help you maintain the habit of taking a pill every day, and they also allow for a withdrawal bleed, which mimics a natural menstrual cycle.
So, in your situation, you should finish the remaining three inactive pills before starting the next pack of Yaz. After you complete the inactive pills, you can start the next pack with the first active pill (the pink one). This ensures that you maintain the correct hormone levels and continue to be protected against pregnancy.

Regarding your question about the cold medication and antibiotics you took on February 7, it’s important to note that most common antibiotics do not affect the efficacy of birth control pills. However, some antibiotics, like rifampin, can reduce the effectiveness of hormonal contraceptives. If you were prescribed a different antibiotic, it’s unlikely to have impacted your birth control. If you have concerns about specific medications, it’s always best to consult with your healthcare provider or pharmacist for personalized advice.

In summary, continue taking the remaining inactive pills, then start your next pack of Yaz as scheduled. If you have any further concerns about your medications or birth control, don’t hesitate to reach out to your healthcare provider for clarification. They can provide you with the most accurate information based on your health history and the specific medications you are taking.
Additionally, if you experience any unusual symptoms or have concerns about your menstrual cycle or contraceptive effectiveness, it’s always a good idea to consult with your healthcare provider. They can help address any issues and ensure that you are using your birth control effectively.

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