A nurse is preparing an IM injection. The medication is labelled '100 mg/2 mL'. The ordered dose is 75 mg. How many mL should the nurse draw up?

MEDICATION CALCULATION: Use the formula (Desired ÷ Have) × Volume: Desired: 75 mg. Have: 100 mg. Volume: 2 mL. Calculation: (75 ÷ 100) × 2 = 0.75 × 2 = 1.5 mL. VERIFY WITH DIMENSIONAL ANALYSIS: 75 mg × (2 mL / 100 mg) = 150/100 mL = 1.5 mL. NURSING CHECK: 1.5 mL is within the acceptable range for IM injection (typically up to 3 mL for large muscles, up to 1 mL for deltoid). AFTER CALCULATING: Draw up 1.5 mL; visually verify the volume against the syringe markings; check the medication label a third time before injecting. Always show your calculation work on paper, especially for high-alert medications — a calculation error with insulin or heparin can be fatal.