Order: Diazepam 4 mg via nasogastric tube t.i.d. Available: Diazepam oral solution 5 mg per 5 mL. How many milliliters should the client receive per dosage?

Given: Ordered dose of Diazepam: 4 mg Concentration of Diazepam oral solution: 5 mg/5 mL Step 1: Set up the proportion: Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL) Step 2: Substitute the values: 4 mg / Volume = 5 mg/5 mL Step 3: Solve for the unknown volume: Volume = 4 mg / (5 mg/5 mL) Volume = 4 mg x (5 mL/5 mg) Volume = 4 mL