Adult Initially 300-600 mg daily in divided doses, w/ 6-8 hr interval. May increase to 1.2 g daily in initial control, administered until patients reach euthyroid condition. Maintenance dose: 100-300 mg in 3 divided doses.
Thyrotoxic crisis 600-1,200 mg in divided doses.
Childn >10 yr Initially 50-300 mg daily in divided doses, w/ 6-8 hr interval. Maintenance dose: 100-300 mg daily in 2 divided doses w/ 2 hr intervals,
6-10 yr Initially 50-150 mg daily in divided doses, w/ 6-8 hr interval.
Neonatal thyrotoxicosis 10 mg/kg.