NPC-06 to Pain Associated With Acute Herpes Zoster

"1. Initial dose (Day 1) \<Dose\> An 18 mg/kg of NPC-06 will be injected by intravenous drip infusion once daily. The maximum dose of the test drug should not exceed 1,200 mg as fosphenytoin sodium.~ \<Administration method\> Dilute the study drug 3 to 4-fold using physiological saline for intravenous infusion and then administer the solution over 18 minutes.~2. Maintenance dose(Day 2～7) Maintenance dose on the next day (Day 2) after the initial dose will be mandatory, and will be dosed up to 6 days. Maintenance dose on Day 3 and thereafter will follow the transition criteria for maintenance dose.~\<Dose\> A 7.5 mg/kg of NPC-06 will be injected as needed by intravenous drip infusion once daily. The maximum dose of NPC-06 should not exceed 500 mg as fosphenytoin sodium.~\<Administration method\> Dilute the study drug 3-to 4-fold using physiological saline for intravenous infusion and then administer the solution over 7 minutes and 30 seconds."

"1. Initial dose (Day 1) \<Dose\> A placebo will be injected by intravenous drip infusion once daily. \<Administration method\> Dilute the study drug 3 to 4-fold using physiological saline for intravenous infusion and then administer the solution over 18 minutes.~2. Maintenance dose(Day 2～7) Maintenance dose on the next day (Day 2) after the initial dose will be mandatory, and will be dosed up to 6 days. Maintenance dose on Day 3 and thereafter will follow the transition criteria for maintenance dose.~\<Dose\> A placebo will be injected as needed by intravenous drip infusion once daily. Dilute the study drug 3-to 4-fold using physiological saline for intravenous infusion and then administer the solution over 7 minutes and 30 seconds."