Can I Take Menstrual Delay Pills After Emergency Contraceptive?

Can I take menstrual delay pills after taking emergency contraceptive pills?

Hello, I would like to ask if it is safe to take a menstrual delay medication after taking emergency contraception.
My menstrual cycle has been irregular for the past few months, so I'm unsure what to do.
I had my period on April 24-25, but it did not come in May.
In June, my period did not arrive until June 14-15, and during this time, I did not take any contraceptive or menstrual delay medications.
I took emergency contraception on July 10 (within 72 hours).
As of July 15, my period still hasn't arrived, but I have a trip planned for July 20 and I'm worried about getting my period.
I am considering taking menstrual delay medication.
Is it safe to do so? Will it affect the efficacy of the emergency contraception? Thank you, doctor.

Niming, 20~29 year old female. Ask Date: 2015/07/15

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, you can take the medication for menstrual regulation, but you need to obtain it quickly from the obstetrics and gynecology department.
Wishing you good health.

Reply Date: 2015/07/15

More Info

When considering the use of menstrual delay pills after taking emergency contraceptive pills (ECPs), it is essential to understand how these medications work and their potential interactions.
Emergency contraceptive pills, such as Plan B or Ella, are designed to prevent pregnancy after unprotected intercourse or contraceptive failure. They work primarily by delaying ovulation, which means they can be effective if taken before ovulation occurs. However, if ovulation has already happened, ECPs may not be effective. The timing of taking ECPs is crucial, as they are most effective within 72 hours of unprotected intercourse, but some types, like Ella, can be taken up to 120 hours after.

On the other hand, menstrual delay pills, often containing hormones like norethisterone, are used to postpone menstruation. They work by altering the hormonal signals that trigger the menstrual cycle, effectively delaying the onset of menstruation for a short period.
In your case, since you took emergency contraception on July 10 and are considering taking menstrual delay pills on July 20 to avoid menstruation during your trip, there are a few points to consider:
1. Timing and Hormonal Interaction: Taking menstrual delay pills shortly after ECPs can potentially alter your hormonal balance. While there is no direct contraindication against taking both medications, the hormonal changes induced by the menstrual delay pills may affect the timing of your next period and could potentially interfere with the effectiveness of the ECPs, although this is not well-documented.

2. Menstrual Cycle Variability: Given that your menstrual cycle has been irregular, it is challenging to predict how your body will respond to these medications. The irregularity may be due to various factors, including stress, hormonal imbalances, or underlying health conditions. Therefore, taking both medications in close succession may lead to further unpredictability in your cycle.

3. Consultation with a Healthcare Provider: It is always advisable to consult with a healthcare provider before taking any hormonal medications, especially in close succession. They can provide personalized advice based on your health history and current situation. They may also suggest alternative methods to manage your menstrual cycle or address any underlying issues contributing to your irregular periods.

4. Potential Side Effects: Both ECPs and menstrual delay pills can have side effects, including nausea, breast tenderness, and changes in mood. Taking them together may increase the likelihood of experiencing these side effects. Monitoring how your body reacts to these medications is essential.

5. Pregnancy Testing: Since you took ECPs, it would be prudent to take a pregnancy test if your period does not arrive within a week after your expected date. This will help clarify your situation and guide further decisions regarding your menstrual health.

In summary, while it is possible to take menstrual delay pills after emergency contraceptive pills, it is crucial to consider the potential hormonal interactions and the unpredictability of your menstrual cycle. Consulting with a healthcare provider will ensure that you make informed decisions that prioritize your health and well-being.

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Hello, you can continue with the next pack. Wishing you good health.