TRACTOCILE indeholder atosiban (INN), et syntetisk peptid ([Mpa1, D- Tyr( Et) 2, Thr4, Orn8] - oxytocin), der er en kompetitiv antagonist til humant oxytocin på receptorniveau.
TRACTOCILE contains atosiban (INN), a synthetic peptide ([Mpa1, D-Tyr(Et)2, Thr4, Orn8]-oxytocin) which is a competitive antagonist of human oxytocin at receptor level.