What to Do If You Lose a Birth Control Pill: Impact on Your Cycle - Obstetrics and Gynecology

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Menstrual regulation contraceptives


This afternoon, I went to the hospital to pick up my oral contraceptive pills for regulating my menstrual cycle.
When I was about to take the first pill tonight, I accidentally lost it.
I called the medication consultant to ask what to do, and they told me to just take the second pill instead.
I did take it...
I want to know if missing one pill and taking a different colored pill at a certain time will affect my next menstrual period.
I'm worried it might have an impact, and I'm considering going back to the hospital to get a replacement for the missed pill.
Is that necessary, or is it okay? Also, does my period come a few days after finishing the pills?

MOMO, 20~29 year old female. Ask Date: 2009/08/20

Dr. Zhou Dali reply Obstetrics and Gynecology


It is recommended to consult with the original physician.

Reply Date: 2009/08/20

More Info


When you lose a birth control pill, it can understandably cause concern about its impact on your menstrual cycle and overall contraceptive effectiveness. The first thing to note is that the specific instructions for what to do when a pill is missed can vary depending on the type of birth control pill you are using—combination pills (which contain both estrogen and progestin) or progestin-only pills (also known as the mini-pill).

If you accidentally miss a pill, the general recommendation is to take the missed pill as soon as you remember. If you realize the mistake on the same day, you should take it right away, even if that means taking two pills in one day (the missed pill and the scheduled one). If you forget to take a pill for more than 24 hours, the guidance can differ slightly. For combination pills, if you miss one pill, you can take it as soon as you remember and continue with your pack as usual. However, if you miss two or more pills, you may need to follow specific instructions, which often include using backup contraception for a short period.

Regarding your concern about the color of the pills and their impact on your menstrual cycle, it’s important to understand that the color of the pills is typically related to the hormone dosage. In many combination pill packs, the first few weeks contain active hormone pills, while the last week usually contains placebo pills (which are often a different color). If you miss a pill during the active phase, it can potentially disrupt your hormone levels, but taking the missed pill as soon as you remember helps mitigate this risk.

As for your menstrual cycle, if you take your pills consistently, your period should generally occur during the placebo week, which is the last week of your pill pack. If you miss a pill, it may cause your period to come earlier or later than expected, but this is not guaranteed. Some women may experience spotting or breakthrough bleeding if they miss a pill, while others may not notice any significant changes.

If you are particularly worried about the missed pill affecting your cycle or if you experience any unusual symptoms, it may be a good idea to consult with your healthcare provider. They can provide personalized advice based on your specific situation and the type of birth control you are using. Additionally, if you feel uncertain about your current pack, obtaining a new one to ensure you have the correct dosage and to avoid further missed pills could be beneficial.

In summary, if you lose a birth control pill, take the next one as soon as you remember, and if you miss more than one, follow the specific guidelines for your type of pill. While a missed pill can potentially affect your cycle, taking the appropriate steps can help minimize any disruptions. Always consult with a healthcare professional if you have concerns about your contraceptive method or menstrual cycle.

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