Dosage Calculation: PN Fundamentals
Online Practice Assessment 3.0 Exam
Questions And Answers
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? -
correct answer ✅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? -
correct answer ✅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? -
correct answer ✅2 mL
Patient needs 20mg for the injection & 1mL = 10mg SO 2mL = 20mg
, Dosage Calculation: PN Fundamentals
Online Practice Assessment 3.0 Exam
Questions And Answers
Administering morphine 4 mg IM. Available is 10 mg/mL. How
many mL for the injection? -
correct answer ✅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? -
correct answer ✅14 Days
Discard suspension after 14 days
Administering codeine 20 mL oral solution. How many teaspoons
(tsp) does this equal? -
correct answer ✅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? -
correct answer ✅2 cap
Patient needs 7.5mg per kg & is 220lb; FYI lb/2.2 = x kg
Online Practice Assessment 3.0 Exam
Questions And Answers
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? -
correct answer ✅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? -
correct answer ✅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? -
correct answer ✅2 mL
Patient needs 20mg for the injection & 1mL = 10mg SO 2mL = 20mg
, Dosage Calculation: PN Fundamentals
Online Practice Assessment 3.0 Exam
Questions And Answers
Administering morphine 4 mg IM. Available is 10 mg/mL. How
many mL for the injection? -
correct answer ✅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? -
correct answer ✅14 Days
Discard suspension after 14 days
Administering codeine 20 mL oral solution. How many teaspoons
(tsp) does this equal? -
correct answer ✅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? -
correct answer ✅2 cap
Patient needs 7.5mg per kg & is 220lb; FYI lb/2.2 = x kg
