Will diarrhea affect plan b effectiveness?

Diarrhea in general interfere with the absorption of the pill in the upper digestive tract. That stool represents material on the lower colon that has accumulated over a few days. When it flushes out, the material from above usually takes a day or so to move down but the pill was absorbed in the first 2 hours.

Agree with Dr. Ferguson. . If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex : https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines Get HPV vaccine.