Drug reference
ulipristal acetate
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Drug class
Endocrine (Progestin Preparations)
Mechanism of action
Selective progesterone receptor modulator with antagonistic and partial agonistic effects. When taken immediately before ovulation, postpones follicular rupture. It is thought that the primary mechanism of action for emergency contraception is inhibition or delay of ovulation
Common side effects
- Headache
- Nausea
- Intermenstrual bleeding
- Abdominal and upper abdominal pain
- Menstruation occurring ≥7 days than expected
- Dysmenorrhea
Related conditions
Frequently asked questions
What drug class is ulipristal acetate?
ulipristal acetate belongs to: Endocrine.
How does ulipristal acetate work?
Selective progesterone receptor modulator with antagonistic and partial agonistic effects. When taken immediately before ovulation, postpones follicular rupture. It is thought that the primary mechanism of action for emergency contraception is inhibition or delay of ovulation
What are the common side effects of ulipristal acetate?
Headache, Nausea, Intermenstrual bleeding, Abdominal and upper abdominal pain, Menstruation occurring ≥7 days than expected, Dysmenorrhea
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