The healthcare provider prescribes trimethobenzamide 100 mg IM every 6 hours for a client with postoperative vomiting. "Each 2 mL single-dose vial contains 200 mg of trimethobenzamide. How many mL should the nurse administer to the client for each dose? (Enter numeric value only.)

Given: Ordered dose of trimethobenzamide: 100 mg IM every 6 hours Concentration of trimethobenzamide: 200 mg/2 mL vial Step 1: Set up the proportion: Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL) Step 2: Substitute the values: 100 mg / Volume = 200 mg/2 mL Step 3: Solve for the unknown volume: Volume = 100 mg / (200 mg/2 mL) Volume = 100 mg x (2 mL / 200 mg) Volume = 1 mL