What is the MAXIMUM interval between unprotected intercourse and intake of ulipristal acetate for emergency contraception within which it retains its licensed indication?
- A 24 hours
- B 72 hours
- C 120 hours ✓
- D 168 hours
Correct answer: C. 120 hours
Explanation
Ulipristal acetate, a selective progesterone receptor modulator given as a single 30 mg dose, is licensed for use up to 120 hours (5 days) after unprotected intercourse and remains more effective than levonorgestrel beyond 72 hours. Levonorgestrel alone loses its indication at 72 hours, which kills distractor B. The copper IUD shares the same 5-day window but offers far higher efficacy, and 168 hours exceeds every licensed hormonal method.
Reference: Katzung Basic and Clinical Pharmacology, 16th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.