Dosage Calculation: PN Fundamentals Online Practice Assessment 3.0

Dosage Calculation: PN Fundamentals Online Practice Assessment 3.0 Administering phenobarbital 6 mg/kg/day PO divided in equal doses every 12 hrs to a patient weighing 44 lb. Available 20 mg/5 mL. How many mL per dose? - ANS 15 mL Patient needs 6 mg per kg a day, in 2 doses that are 12hrs apart & is 44lb; FYI lb/2.2 = x kg 5mL = 20mg SO 1 mL = 4 mg 40lb/2.2 = 20kg so 6mg*20kg = 120mg a day OR 60mg per 12hr dose SO 60mg/4mg= 15mL Administering cefaclor 500 mg PO every 12 hrs. Available cefaclor 250 mg/5 mL. How many mL per dose? - ANS 10 mL Patient needs 500mg per dose & 5mL = 250mg SO 10mL = 500mg Administering furosemide 20 mg IM. Available furosemide 10 mg/mL. How many mL for the injection? - ANS 2 mL Patient needs 20mg for the injection & 1mL = 10mg SO 2mL = 20mg Administering morphine 4 mg IM. Available is 10 mg/mL. How many mL for the injection? - ANS 0.4 mL Patient needs 4mg for the injection & 1mL = 10mg SO 0.4mL = 4mg (Desired*Quantity)/Have = X mL OR (4mg*1mL)/10mg = 0.4mL Discard suspension how many days after reconstitution? - ANS 14 Days Discard suspension after 14 days Administering codeine 20 mL oral solution. How many teaspoons (tsp) does this equal? - ANS 4 tsp FYI 1 tsp = 5 mL so 4 tsp = 20 mL Administering metronidazole 7.5 mg/kg PO. Patient weighs 220 lbs. Available 375 mg/capsule. How many capsules (cap) needed? - ANS 2 cap Patient needs 7.5mg per kg & is 220lb; FYI lb/2.2 = x kg 220lb/2.2 = 100kg; 7.5mg*100kg = 750mg needed 1cap = 375mg SO 2cap = 750