Randomized trial of oral versus vaginal misoprostol 2 days after mifepristone 200 mg for abortion up to 63 days of pregnancy.
This prospective, open-label, randomized trial of healthy adult women up to 9 weeks pregnant compared mifepristone 200 mg followed 2 days later with misoprostol 400 microg orally versus misoprostol 800 microg vaginally. The study was interrupted after the oral misoprostol group experienced a higher than expected failure rate. This treatment was discontinued and another substituted consisting of oral misoprostol 800 microg divided into two doses two hours apart. Women returned for a follow-up visit from Day 4 to 8. All women with a continuing pregnancy received a repeat dose of misoprostol vaginally and returned before Day 15. The primary outcome measure was a complete medical abortion without surgical intervention at the first visit. Of the 1045 women enrolled, 1011 had complete data: Group 1 (220) used oral misoprostol 400 microg, Group 2 (269) used oral misoprostol 800 microg, and Group 3 (522) used vaginal misoprostol 800 microg. At first follow-up visit, the primary outcome, that is, a complete abortion, was 84% for Group 1, 92% for Group 2, and 96% for Group 3, p < 0.001. After a second dose of vaginal misoprostol in women with on-going pregnancies at their first follow-up visit, the complete abortion rates were 91%, 95%, and 98%, respectively, p < 0.001. There were minimal differences in side effects, onset of bleeding and overall acceptability in the three groups. Mifepristone 200 mg followed by vaginal misoprostol 2 days later was more effective at inducing an abortion up to 9 weeks of pregnancy than the same dose of mifepristone followed by oral misoprostol.
Schaff
Eric A
EA
Department of Family Medicine, University of Rochester School of Medicine, Rochester, NY 14620, USA. eschaff@aol.com
Fielding
Stephen L
SL
Westhoff
Carolyn
C
D000020:Abortifacient Agents, Nonsteroidal / Q000008:administration & dosage* / Q000009:adverse effects; D000021:Abortifacient Agents, Steroidal / Q000008:administration & dosage* / Q000009:adverse effects; D000028:Abortion, Induced / Q000379:methods* / Q000706:statistics & numerical data; D000282:Administration, Intravaginal; D000284:Administration, Oral; D000328:Adult; D005260:Female; D005865:Gestational Age; D006801:Humans; D015735:Mifepristone / Q000008:administration & dosage* / Q000009:adverse effects; D016595:Misoprostol / Q000008:administration & dosage* / Q000009:adverse effects; D010146:Pain; D011247:Pregnancy; D016896:Treatment Outcome; D014592:Uterine Hemorrhage
D000020:Abortifacient Agents, Nonsteroidal; D000021:Abortifacient Agents, Steroidal; D016595:Misoprostol; D015735:Mifepristone