Ritodrine is a:-: (A) b 2 agonist, (B) b antagonist, (C) a agonist, (D) a 1 antagonist
Answer is A. * Selective b2 stimulants : salbutamol, terbutaline, salmeterol, formoterol and ritodrine * b2 agonists can be used for preterm labour as they cause uterine relaxation. * b2 Stimulators Used in preterm labour : RITODRINE ISOXSUPRINE