Timing for Taking the Second Dose of Medication Abortion: What You Need to Know - Obstetrics and Gynecology

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Timing for the second dose of medication abortion?


Hello, Doctor.
I took the first dose around 10:00 AM on December 18th.
The clinic said to take the second dose around the morning or noon of December 20th.
Since I have work and cannot take leave, and I also don't want others to know about this matter...
I see that the educational information on RU-486 states to take the second dose 36-48 hours later.
In that case, can I take the second dose earlier, around midnight on December 19th?

T, 30~39 year old female. Ask Date: 2023/12/18

Dr. Lin Manying reply Obstetrics and Gynecology


Hello: Please return for a follow-up consultation with the prescribing physician regarding the use of RU486.
There are various methods for taking this medication, so do not rely solely on the original instructions for self-administration.
The Hualien Hospital of the Ministry of Health and Welfare cares about your health.

Reply Date: 2023/12/18

More Info


When it comes to medication abortion, timing is crucial for the effectiveness and safety of the procedure. The standard protocol for a medication abortion typically involves taking two different medications: mifepristone (often referred to as RU-486) and misoprostol. The first medication, mifepristone, is usually taken at a healthcare provider's office, while the second medication, misoprostol, is taken at home.

The recommended interval between taking mifepristone and misoprostol is generally between 36 to 48 hours. This timing is based on clinical studies that have shown that adhering to this schedule maximizes the effectiveness of the abortion process and minimizes potential complications. Taking misoprostol too early may reduce its effectiveness, while waiting too long could lead to unnecessary delays in the abortion process.

In your case, you mentioned that you took the first dose of mifepristone on December 18th around 10:00 AM and that your clinic advised you to take the second dose of misoprostol on December 20th around noon. If you are considering taking the second dose earlier, such as on the night of December 19th, it is important to consult with your healthcare provider first. While some individuals may feel comfortable adjusting the timing slightly, it is best to follow the guidance of your healthcare professional to ensure the best outcome.

Here are some additional considerations regarding the timing of your second dose:
1. Effectiveness: Taking misoprostol too soon after mifepristone may not allow enough time for the first medication to work effectively. The mifepristone works by blocking the hormone progesterone, which is necessary for the pregnancy to continue. Misoprostol then causes the uterus to contract and expel the pregnancy. If misoprostol is taken too early, it may not be as effective.

2. Side Effects: Misoprostol can cause side effects such as cramping, bleeding, nausea, and diarrhea. Taking it at the recommended time allows for better management of these side effects, as they can be anticipated and prepared for.

3. Follow-Up Care: After taking misoprostol, it is important to have a follow-up appointment with your healthcare provider to ensure that the abortion is complete and to address any complications or concerns. If you take the medication outside the recommended timeframe, it may complicate follow-up care.

4. Privacy Concerns: If your concern about timing is related to privacy and not wanting others to know about your situation, it may be helpful to discuss this with your healthcare provider. They can offer guidance on how to manage your schedule while still adhering to the recommended protocol.

In conclusion, while you may be tempted to take the second dose of misoprostol earlier than advised, it is essential to prioritize safety and effectiveness by adhering to the recommended timing. Always consult with your healthcare provider before making any changes to your medication schedule to ensure the best possible outcome for your health and well-being.

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