When is the Right Time to Take Menstrual Delay Medication? - Obstetrics and Gynecology

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When is the appropriate time to take menstrual regulation medication?


I visited a gynecologist at the end of December due to abnormal bleeding, and the doctor prescribed me medication to regulate my menstrual cycle.
I took it for only 5 days, until December 25, and then my period started on December 30.
My last period was on November 30, which was normal and occurred once a month.
I was expecting my next period on January 29, but it hasn't arrived yet.
I have a trip planned for February 6-7, and I would like to know if I can take the menstrual regulation medication again on February 3?

Xiao Zhen, 20~29 year old female. Ask Date: 2021/01/31

Dr. Wu Xianghui reply Obstetrics and Gynecology


Menstrual delay medications should be started no later than one week before the expected onset of menstruation, and theoretically, they can extend the menstrual cycle by 7 to 10 days.

Reply Date: 2021/01/31

More Info


When it comes to taking menstrual delay medication, timing and understanding the medication's mechanism are crucial for achieving the desired effect. Menstrual delay medications, often containing hormones such as progestins, are typically prescribed to postpone menstruation for various reasons, including travel, special events, or irregular cycles.

In your case, you mentioned that you were prescribed medication to regulate your menstrual cycle after experiencing abnormal bleeding. You took the medication for five days, and your period started on December 30, following a normal cycle that began on November 30. Now, you are concerned about the timing of your next period, which you expected to start around January 29, but it has not yet arrived. You are considering taking the menstrual delay medication again on February 3, as you have travel plans on February 6-7.

Firstly, it is essential to understand that menstrual delay medications are most effective when taken before the expected onset of menstruation. Typically, these medications should be started a few days prior to the anticipated period to allow the hormones to take effect and postpone menstruation. Taking the medication after your period has already been delayed may not have the desired effect, as the body’s hormonal balance may already be in flux.

Moreover, it is important to consider the potential side effects and risks associated with taking hormonal medications. Common side effects can include nausea, headaches, mood changes, and breast tenderness. Additionally, using hormonal medications without proper medical guidance can lead to irregular cycles or other complications. Therefore, it is advisable to consult your healthcare provider before taking any hormonal medication again, especially if you are considering taking it close to your travel dates.

If you have not had your period by February 3 and are considering taking the medication, it is crucial to discuss this with your doctor. They can provide personalized advice based on your medical history, the specific medication prescribed, and your current health status. They may also want to rule out any underlying conditions that could be affecting your menstrual cycle, such as hormonal imbalances, stress, or other health issues.

In summary, while menstrual delay medications can be effective in postponing your period, they should be taken with caution and under the guidance of a healthcare professional. If you are considering taking the medication on February 3, please consult your doctor to ensure it is safe and appropriate for your situation. They can help you navigate your menstrual health and provide the best recommendations for your upcoming travel plans.

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