A client with neuroleptic malignant syndrome receives a prescription for dantrolene 1.5 mg/kg IV. The client weighs 198 pounds. The label on 250 mg vial reads, "Reconstitute with 5 mL sterile water for injection, USP. Reconstitution yields 50 mg/mL." How many mg should the nurse administer? (Enter numeric value only.)

Given: 1 kg = 2.2 lbs Client weighs 198 lbs Step-by-Step Calculation: Step 1: Convert weight from pounds to kilograms: Weight in kg = (Weight in lbs) ÷ (2.2 lbs/kg) Weight in kg = 198 ÷ 2.2 Weight in kg = 90 (rounded to the nearest whole number) Step 2: Calculate the required dosage in mg: Dosage = (Weight in kg) × (Dosage in mg/kg) Dosage = 90 × 1.5 Dosage = 135 Therefore, the nurse should administer 135 mg of dantrolene.