Document Detail

Ulipristal acetate: a new emergency contraceptive that is safe and more effective than levonorgestrel.
MedLine Citation:
PMID:  21175385     Owner:  NLM     Status:  In-Process    
Ulipristal acetate (UPA), a selective progesterone receptor modulator, when taken as a single 30-mg dose, is safe and effective for emergency contraception up to 5 days (120 h) following unprotected intercourse. This indication has been approved in Europe since May 2009 and was approved by the US FDA in August 2010. The older progesterone-only emergency contraceptive, levonorgestrel (LNG), is approved only up to 72 h after unprotected intercourse. UPA is effective in delaying or inhibiting ovulation, even if taken 24 to 48 h prior to expected ovulation, a time when LNG is no longer effective. A recent meta-analysis of two randomized clinical trials showed UPA to have a pregnancy risk 42% lower than LNG up to 72 h, and 65% lower in the first 24 h following unprotected intercourse. In a randomized trial enrolling women up to 5 days after unprotected intercourse, significantly more pregnancies were prevented with UPA than with LNG when taken beyond 72 h.
Paul M Fine
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Women's health (London, England)     Volume:  7     ISSN:  1745-5065     ISO Abbreviation:  Womens Health (Lond Engl)     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101271249     Medline TA:  Womens Health (Lond Engl)     Country:  England    
Other Details:
Languages:  eng     Pagination:  9-17     Citation Subset:  IM    
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