Hesi rn dosage calculation proctored exam
Calculation
The healthcare provider (HCP) prescribes erythromycin suspension 250 mg PO every 6 hours for a child with streptococcal pharyngitis. The drug is available in a suspension labeled, "200 mg/5 mL." How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest hundredth.)
mL
Explanation & Rationale
Calculation: Desired dose = 250 mg Available concentration = 200 mg / 5 mL Calculate the volume to administer: Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL) = 250 mg / (200 mg / 5 mL) = 250 mg / 40 mg/mL = 6.25 mL Rounding to the nearest hundredth remains 6.25 mL.
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