Relief of bronchoconstriction
Adult: As sulfate: 100-200 mcg up to 6 times/day by aerosol inhalation. As HCl: 250-500 mcg every 4-6 hr by nebulisation; max: 3 mg/day for nebulisation.
Intravenous
Premature labour
Adult: As sulfate: slow IV Inj of 10 mcg loading dose over 5-10 minutes, followed by an initial infusion rate of 0.3 mcg/minute. Prolonged infusion at 0.075 mcg/minute may be given if there is no cervical change.
Oral
Relief of bronchoconstriction
Adult: 0.5-1 mg tid.