Adults:IV 40 mg (over 1 to 2 min). If response not satisfactory within 1 h, increase to 80 mg.
Infants and Children:IV/IM Usual initial dose: 1 mg/kg. If response not satisfactory, may increase by 1 mg/kg not sooner than 2 h after previous dose. Max dose: 6 mg/kg. Premature infant’s max dose: 1 mg/kg/day.
Adults:PO Usual initial dose: 20 to 80 mg/day as a single dose may repeat 6 to 8 h later if needed; may titrate up to 600 mg/day. Maintenance: Give determined single dose once or twice daily (8 AM and 2 PM). IV/IM 20 to 40 mg over 1 to 2 min. Repeat 2 h later if needed.
Children:PO Usual initial dose: 2 mg/kg as a single dose. May increase by 1 or 2 mg/kg 6 to 8 h later if needed. Max dose: 6 mg/kg.
Adults:PO 40 mg twice daily.
Tablets and oral solution
Administer without regard to meals. Administer with food if GI upset occurs.
Do not use tablets that are discolored.
Measure and administer prescribed dose of oral solution using supplied dosing cup, calibrated dosing syringe, or calibrated dosing spoon.