Emergency Contraceptive Pills: Timing and Usage Guidelines - Pharmacology

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Emergency contraceptive pill


Hello, doctor.
I would like to ask, if I start taking the 21-day oral contraceptive pill named Dailian on the fifth day of my menstrual cycle, will I have contraceptive protection starting from the seventh day, or will it take a month to become effective? Additionally, how long should I continue taking the oral contraceptive before considering stopping? Thank you, doctor.

bbb, 20~29 year old female. Ask Date: 2021/12/26

Dr. Zheng Shuwen reply Pharmacology


Hello, in response to your question, here is the information: Birth control pills must be taken regularly to achieve the desired contraceptive effect.
Their mechanism is to adjust the hormone levels in your body; insufficient levels can easily lead to failure.
You need to take them continuously for at least 7 days to achieve contraceptive effectiveness.
The recommended method is to start taking them on the first day of your natural menstrual cycle (the first day of your period).
You can also start between the 2nd and 5th day of your period.
However, it is advised to use an additional barrier method of contraception during the first 7 days of the initial cycle.

Regarding how long you should stop taking the birth control pills if you plan to conceive or if you experience any adverse symptoms such as diarrhea, nausea, vomiting, gastrointestinal discomfort, or breast tenderness, it is recommended to discontinue use.
If you have any further questions, feel free to call during business hours.
Thank you.
Consultation phone number: 03-3698553.

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Reply Date: 2021/12/26

More Info


Understanding emergency contraceptive pills (ECPs) and their usage is crucial for effective family planning and preventing unintended pregnancies. The specific pill you mentioned, "Dailian," is a combination oral contraceptive pill that contains hormones designed to prevent ovulation, thicken cervical mucus, and thin the uterine lining to prevent fertilization and implantation.

When starting a new contraceptive regimen, timing is essential. If you begin taking a combination oral contraceptive pill like Dailian on the fifth day of your menstrual cycle, it is important to understand how this affects its contraceptive efficacy. Generally, if you start taking the pill during the first five days of your menstrual cycle, it is effective immediately. However, if you start taking it after the fifth day, it may take up to seven days to achieve full contraceptive effectiveness. Therefore, since you started on the fifth day, you should be protected from pregnancy after seven days of consistent use.

Regarding the duration of taking the pill, it is typically recommended to take combination oral contraceptives continuously for as long as you wish to prevent pregnancy. Many women take them for several months or even years, depending on their reproductive plans and health considerations. However, it is advisable to have regular check-ups with your healthcare provider to assess any potential side effects and ensure that the contraceptive method remains suitable for you.

In terms of stopping the pill, if you decide to discontinue using Dailian, you can do so at any time. However, it is important to note that once you stop taking the pill, your fertility may return quickly, and you could become pregnant if you have unprotected intercourse. If you are considering stopping the pill, it is wise to discuss your plans with your healthcare provider, especially if you are considering other contraceptive methods or if you have any underlying health concerns.

In summary, starting Dailian on the fifth day of your menstrual cycle means you should expect full contraceptive protection after seven days of consistent use. You can continue taking the pill for as long as you wish to prevent pregnancy, but regular consultations with your healthcare provider are recommended to monitor your health and discuss any changes in your contraceptive needs. Always remember that while oral contraceptives are effective, they do not protect against sexually transmitted infections (STIs), so consider additional protection methods if needed.

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