Heart Lexicon

What is the difference?

Emergency contraceptive pill vs Medication abortion

Both involve taking pills around the time of a possible pregnancy, so they are frequently confused, sometimes in public debate too. The emergency contraceptive pill prevents a pregnancy from starting; medication abortion ends a pregnancy that has already begun.

General information, not medical advice. For advice about your own situation, talk to a clinician, pharmacist or sexual health clinic.

Emergency contraceptive pill

The emergency contraceptive pill is a single-dose tablet taken after unprotected sex that mainly works by delaying ovulation.

Full entry

Medication abortion

Medication abortion ends a pregnancy using medicines, usually mifepristone followed by misoprostol, rather than a procedure.

Full entry

Side by side

Emergency contraceptive pillMedication abortion
PurposeEmergency contraceptive pillPrevents pregnancy after unprotected sex.Medication abortionEnds an existing pregnancy.
How it worksEmergency contraceptive pillMainly delays ovulation.Medication abortionMifepristone blocks progesterone, then misoprostol causes the uterus to empty.
When it is usedEmergency contraceptive pillAs soon as possible after sex; levonorgestrel within three days, ulipristal up to five.Medication abortionMost commonly in the first trimester of a pregnancy.
Effect on a pregnancyEmergency contraceptive pillCannot end a pregnancy.Medication abortionEnds the pregnancy.
Where to get itEmergency contraceptive pillOften from a pharmacist, who can also advise on a copper IUD.Medication abortionDepends on local law; local health services are the best guide.

In short

The emergency pill acts before pregnancy and cannot end one; medication abortion ends a pregnancy. A pharmacist, clinic or local health service can explain the options.

What they have in common

Both are medicines used in reproductive health, and both are time-sensitive, so getting advice early helps.

Sources

  1. NHSThe emergency contraceptive pill (morning after pill)
  2. WHOAbortion
  3. ACOGEmergency Contraception

More comparisons

Last reviewed 10 October 2026. Spotted a mistake?