Question:
What is the dose of ulipristal acetate?
What is the dose of ulipristal acetate?
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One tablet, milligrams not micrograms, for emergency contraception.
Updated On: Jun 23, 2026
- 300mg
- 30mg
- 300µg
- 30µg
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The Correct Option is B
Solution and Explanation
Step 1: Ulipristal acetate is a selective progesterone receptor modulator (progesterone agonist/antagonist) marketed for emergency contraception. Taken before ovulation it delays or inhibits ovulation, and in the early luteal phase it can reduce endometrial thickness and affect implantation.
Step 2: For emergency contraception, the dose is one 30 mg tablet taken as soon as possible, within 120 hours (five days) of unprotected intercourse or contraceptive failure.
Step 3: The microgram options (300 micrograms, 30 micrograms) are far too small and 300 mg is too large; the correct single dose is 30 mg.
Step 2: For emergency contraception, the dose is one 30 mg tablet taken as soon as possible, within 120 hours (five days) of unprotected intercourse or contraceptive failure.
Step 3: The microgram options (300 micrograms, 30 micrograms) are far too small and 300 mg is too large; the correct single dose is 30 mg.
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