gemeprost gemeprost gemeprost (16, 16-dimethyl-trans-delta2 pge1 methyl ester) is an analogue of prostaglandin e1. gemeprostclinical datatrade namescervagemother namesmethyl (e)-7--5-oxo-cyclopentyl]hept-2-enoateahfs/drugs.cominternational drug namespregnancycategory au: b3 routes ofadministrationpessaryatc codeg02ad03 (who) legal statuslegal status au: s4 (prescription only) uk: pom (prescription only) identifiers iupac name methyl (2e,11α,13e,15r)-11,15-dihydroxy-16,16-dimethyl-9-oxoprosta-2,13-dien-1-oate cas number64318-79-2 ypubchem cid5282237drugbankdb08964 nchemspider4445416 yunii45kzb1folskeggd02073 ycomptox dashboard (epa)dtxsid40895073 echa infocard100.058.869 chemical and physical dataformulac23h38o5molar mass394.552 g·mol−13d model (jsmol)interactive image smiles o=c1c(o)(/c=c/(o)c(c)(c)cccc)1cccc\c=c\c(=o)oc inchi inchi=1s/c23h38o5/c1-5-6-15-23(2,3)21(26)14-13-18-17(19(24)16-20(18)25)11-9-7-8-10-12-22(27)28-4/h10,12-14,17-18,20-21,25-26h,5-9,11,15-16h2,1-4h3/b12-10+,14-13+/t17-,18-,20-,21-/m1/s1 ykey:kybohgverhwssv-vnivijdlsa-n y ny (what is this?) (verify) clinical use it is used as a treatment for obstetric bleeding. it is used with mifepristone to terminate pregnancy up to 24 weeks gestation. side effects vaginal bleeding, cramps, nausea, vomiting, loose stools or diarrhea, headache, muscle weakness; dizziness; flushing; chills; backache; dyspnoea; chest pain; palpitations and mild pyrexia. rare: uterine rupture, severe hypotension, coronary spasms with subsequent myocardial infarctions.