Can having diarrhea decrease the effectiveness of my pill?
24-year-old woman5 years ago
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Two hours after taking my birth control pill (Marvelon), I had a slight diarrhea.
Is this dangerous for the effectiveness?
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Sarah-Yan Chagnon · 5 years ago
Hello,
No, a simple diarrhea is not enough to decrease the effectiveness of your pill. It is more repeated diarrhea, for example during a gastroenteritis or when taking antibiotics, that theoretically the pill can decrease in effectiveness. Indeed, we consider that one day of diarrhea is equivalent to "losing" the pill that day.