True about atosiban is?: (A) Is an oxytocin receptor antagonist, (B) Is an progesterone receptor antagonist, (C) Is least effective in inhibiting preterm uterine Contractions, (D) Is a anti-tocolytic drug
Answer is A. Atosiban is a peptide analog of oxytocin that acts as an antagonist at the oxytocin receptors. It is a tocolytic. It suppress uterine contractions and postpones preterm delivery. (Ref.Essentials of medical pharmacology TD Tripathi 6th edition page no.333).