In primi, preterm labour, all of the following can be used as Tocolytic except:
Ritodrine is a beta sympathomimetic drug. It was previously used as iv infusion. Now not used because of severe adverse effects like tachycardia and pulmonary edema TEXTBOOK OF OBSTETRICS, SHEILA BALAKRISHNAN, 2nd EDITION pg:195
Ritodnne
MgSO4
Dexamethasone
Propranolol
Abnormal labor