The patient has an order for a single dose of ceftriaxone 400 mg IM. The final concentration is 500 mg/1.2 ml. How many milliliters will you administer? (Round to the nearest hundredth.)

Ordered dose = 400 mg Available = 500 mg in 1.2 mL Step 1: Use the formula Volume to administer = (Ordered dose ÷ Available dose) × Volume available Step 2: Substitute the values Volume = (400 ÷ 500) × 1.2 Step 3: Calculate Volume = 0.8 × 1.2 = 0.96 mL