The abortifacient effectiveness and plasma prostaglandin concentrations with 15(S)-15-methyl prostaglandin F2alpha methyl ester-containing vaginal silastic devices.
The abortifacient effectiveness of three intravaginal Silastic devices impregnated with 15(S)-15-methyl prostaglandin F2alpha (15(S)-Me-PGF2alpha) methyl ester in concentrations of 0.25%, 0.5%, and 1.0% was investigated. Each concentration was tested in 10 patients with gestations ranging from 8 to 19 weeks. Abortion was successfully induced by prostaglandin alone in 6 patients with the 0.25% device, in 9 patients with the 0.5% device, and all 10 patients treated with the 1.0% device. Additionally, three patients treated with the 0.25% device and one patient treated with the 0.5% device aborted with concomitant, continuous, intravenous oxytocin therapy. The mean abortion time with the 0.25% device was 16.43 hours; with the 0.5% device, 16.49 hours; and with the 1.0% device, 10.18 hours. The peripheral plasma levels of 15(S)-Me-PGF2alpha methyl ester were the most variable with the 0.5% device. The plasma levels of 15(S)-Me-PGF2alpha methyl ester of patients receiving the 0.25% device were similar to the levels of patients receiving the 1.0% device. The intravaginal Silastic device impregnated with 15(S)-Me-PGF2alpha methyl ester appears to be an effective abortifacient, but further study is indicated to determine the most efficient device with the fewest side effects.
D000019:Abortifacient Agents; D000028:Abortion, Induced / Q000009:adverse effects / Q000379:methods*; D000293:Adolescent; D000328:Adult; D003692:Delayed-Action Preparations; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011460:Prostaglandins F / Q000494:pharmacology*; D011465:Prostaglandins, Synthetic / Q000494:pharmacology; D012826:Silicone Elastomers / Q000627:therapeutic use
D000019:Abortifacient Agents; D003692:Delayed-Action Preparations; D011460:Prostaglandins F; D011465:Prostaglandins, Synthetic; D012826:Silicone Elastomers