Dosage Calculation_ PN Fundamentals Online Practice Assessment
Dosage
3.0 Calculation_ PN Fundamentals Online Practice Assessment 3.0 2026-03-04
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?
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?
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?
2 mL
Patient needs 20mg for the injection & 1mL = 10mg SO 2mL = 20mg
Page 1 Dosage Calculation_ PN Fundamentals Online Practice Assessment 3.0.pdf
, Dosage Calculation_ PN Fundamentals Online Practice Assessment
Dosage
3.0 Calculation_ PN Fundamentals Online Practice Assessment 3.0 2026-03-04
Administering morphine 4 mg IM. Available is 10 mg/mL. How many mL for the injection?
0.4 mL
Patient needs 4mg for the injection & 1mL = 10mg SO 0.4mL = 4mg
(DesiredQuantity)/Have = X mL OR (4mg1mL)/10mg = 0.4mL
Discard suspension how many days after reconstitution?
14 Days
Discard suspension after 14 days
Administering codeine 20 mL oral solution. How many teaspoons (tsp) does this equal?
4 tsp
FYI 1 tsp = 5 mL so
4 tsp = 20 mL
Page 2 Dosage Calculation_ PN Fundamentals Online Practice Assessment 3.0.pdf
Dosage
3.0 Calculation_ PN Fundamentals Online Practice Assessment 3.0 2026-03-04
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?
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?
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?
2 mL
Patient needs 20mg for the injection & 1mL = 10mg SO 2mL = 20mg
Page 1 Dosage Calculation_ PN Fundamentals Online Practice Assessment 3.0.pdf
, Dosage Calculation_ PN Fundamentals Online Practice Assessment
Dosage
3.0 Calculation_ PN Fundamentals Online Practice Assessment 3.0 2026-03-04
Administering morphine 4 mg IM. Available is 10 mg/mL. How many mL for the injection?
0.4 mL
Patient needs 4mg for the injection & 1mL = 10mg SO 0.4mL = 4mg
(DesiredQuantity)/Have = X mL OR (4mg1mL)/10mg = 0.4mL
Discard suspension how many days after reconstitution?
14 Days
Discard suspension after 14 days
Administering codeine 20 mL oral solution. How many teaspoons (tsp) does this equal?
4 tsp
FYI 1 tsp = 5 mL so
4 tsp = 20 mL
Page 2 Dosage Calculation_ PN Fundamentals Online Practice Assessment 3.0.pdf
