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Hypertension, initially 100 mg daily increased if necessary to 200 mg daily in 1-2 divided doses; max. 400 mg daily (but high doses rarely necessary).
Angina, 50-100 mg 2-3 times daily.
Arrhythmias, usually 50 mg 2-3 times daily; up to 300 mg daily in divided doses if necessary.
Migraine prophylaxis, 100 mg-200 mg daily in divided doses.
Hyperthyroidism (adjunct), 50 mg 4 times daily or as prescribed by the physician.
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