Dosage calculation rn maternal newborn proctored assessment 3.2
Calculation
A nurse is reviewing a new prescription for propranolol 200 mg PO daily divided in equal doses every 12 hr for a client who has migraine headaches during the premenstrual period. Available is propranolol solution 4 mg/mL. How many mL should the client self-administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
mL
Explanation & Rationale
Calculate the dose per 12 hours: Total daily dose: 200 mg Dose per 12 hours: = 200 mg / 2 = 100 mg Calculate the volume to administer: Volume (mL) = Desired dose (mg) / Available concentration (mg/mL) = 100 mg / 4 mg/mL = 25 mL The client should self-administer 25 mL per dose.
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