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-Initial dose: 75 mg orally per day in divided doses; this may be increased to 150 mg/day (if needed)-Maintenance dose: 40 to 100 mg orally per day-Maximum dose: 150 mg/day Alternate outpatient treatment regimen: 50 to 100 mg orally as a single dose at bedtime; this may be increased by 25 or 50 mg as needed at bedtime to a total of 150 mg/day . ranitidine hcl 150 mg obat apa