HESI RN Dosage Calculation Proctored Exam
Calculation
The healthcare provider prescribes penicillin G benzathine 1,800,000 units intramuscular (IM) for a client with a bacterial infection. The prefilled syringe is labeled, "Penicillin G benzathine 1,200,000 units/2 mL." How many mL should the nurse administer to this client? (Enter numerical value only, rounded to the nearest whole number.)
mL
Explanation & Rationale
Step 1: Determine the dosage required. 1,800,000 units Step 2: Identify the concentration available. 1,200,000 units/2 mL Step 3: Calculate the required volume. (1,800,000 ÷ 1,200,000) × 2 = 1.5 × 2 = 3 mL
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