IVPrevention & treatment of feeling or being sick following radio- or chemotherapy 1-3 mg between 30 sec & 5 min. Max: 9 mg/day. Childn Adjust dose depending on the child's wt, given before radio- or chemotherapy. Max: 2 doses/day, at least 10 min apart. Treatment of feeling or being sick following surgery 1 mg between 30 sec & 5 min. Max: 3 mg/day.