Hypertension. Initial: 40 mg b.i.d. or 80 mg of sustained-release/day; then, increase dose to maintenance level of 120-240 mg/day given in two to three divided doses or 120-160 mg of sustained-release medication once daily. Maximum daily dose should not exceed 640 mg. Pediatric, initial: 0.5 mg/kg b.i.d.; dose may be increased at 3- to 5-day intervals to a maximum of 1 mg/kg b.i.d. The dosage range should be calculated by weight and not by body surface area.
Initial: 80-320 mg b.i.d., t.i.d., or q.i.d.; or, 80 mg of sustained-release once daily; then, increase dose gradually to maintenance level of 160 mg/day of sustained-release capsule. The maximum daily dose should not exceed 320 mg.
Arrhythmias. 10-30 mg t.i.d.-q.i.d. given after meals and at bedtime.
Hypertrophic subaortic stenosis. 20-40 mg t.i.d.-q.i.d. before meals and at bedtime or 80-160 mg of sustained-release medication given once daily.
MI prophylaxis. 180-240 mg/day given in three to four divided doses. Total daily dose should not exceed 240 mg.
Pheochromocytoma, preoperatively. 60 mg/day for 3 days before surgery, given concomitantly with an alpha-adrenergic blocking agent.
Inoperable tumors. 30 mg/day in divided doses.
Migraine. Initial: 80 mg sustained-release medication given once daily; then, increase dose gradually to maintenance of 160-240 mg/day in divided doses. If a satisfactory response has not been observed after 4-6 weeks, the drug should be discontinued and withdrawn gradually.
Initial: 40 mg b.i.d.; then, 120 mg/day up to a maximum of 320 mg/day.
Aggressive behavior. 80-300 mg/day.
Anxiety. 80-320 mg/day.
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Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...