Levonorgestrel pill: works best within 72 hours (sooner is better)
Ulipristal pill: effective up to 120 hours (5 days)
Copper IUD: the most effective option, within 5 days (and ongoing contraception)
Take the pill as soon as possible after unprotected sex
It does not cause an abortion and does not affect future fertility
When to see a doctor urgently
Severe lower tummy pain or a very late/abnormal next period (rule out pregnancy/ectopic)
Vomiting within 2–3 hours of the pill (it may need repeating)
It does not protect against STIs
Repeated need for it means a regular method would be safer
Sooner is more effective. Emergency contraception is not a regular method and is less effective than ongoing contraception. It does not end an existing pregnancy. MedDroid gives general information, not a diagnosis.
Frequently asked questions
How soon should I take the morning-after pill?
As soon as possible — levonorgestrel works best within 72 hours, and ulipristal up to 120 hours. The copper IUD is the most effective and works up to 5 days.
Does emergency contraception cause abortion?
No — it mainly works by delaying ovulation and prevents pregnancy from starting. It does not end an established pregnancy.
Will it affect my future fertility?
No — it has no lasting effect on fertility. Your next period may come a little early or late.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.