Name:
Index No:
DRUG CALCULATION FOR CHILDREN
FEBRUARY, 2009
1. 0.5 g
= _____ mg
2. 6500 mcg
= _____ mg
3. 2 L
= _____ ml
4. 275 mg
= _____ g
5. 0.05 mg
= _____ mcg
6. 1.25 g
= _____ mg
7. 1000 ml
= _____ L
8. 250 mcg
= _____ mg
Abbreviation
•
tds
bd
qds
•
Stat
PRN
pre-meal
•
post-meal
KVO
supp
•
NBM
Syr
PO
•
nocte
gtt
IM
•
IV
S/C
S/L
•
OD
PR
amp
•
NaCl
ID tab
Page 1 of 7
Name:
Index No:
DRUG CALCULATION FOR CHILDREN
FEBRUARY, 2009
Single dose =
child’s wt x recommended dose
dose per day
A child is prescribed paracetamol.The recommended dose is 15mg/kg every 4 hourly. If the child’s
weight is 15kg, calculate how the size of the maximum dose to be given to the child every 4 hourly?
A child is prescribed erythromycin. The recommended dosage is 40mg/kg/day, to be given 4 doses daily.
If the child’s weight is 15kg, calculate the size of a single dose.
A child is to be given amoxycillin. The recommended dose is 80mg/kg/day, to be given 4 doses daily.
Calculate the size of a single dose if the child’s weight is 10kg.
Page 2 of 7
Name:
Index No:
DRUG CALCULATION FOR CHILDREN
FEBRUARY, 2009
Vol. required = strength required x vol. of stock solution
stock available
A boy is ordered to be given IM pethidine 35mg. Pethidine stock ampoules available contain 50mg in 1 ml.
Calculate the volume required for the injection?
A child is prescribed 80 mg of paracetamol syrup. Stock available is 100mg in 5ml. Calculate the volume to
be given to the child
A 3 years old child is prescribed oral chlorphenamine (piriton) 1 mg tds. Stock available is oral liquid 2mg in
5ml. Calculate the amount of chlorpheramine to be given per dose?
Page 3 of 7
Name:
Index No:
DRUG CALCULATION FOR CHILDREN
FEBRUARY, 2009
MORE EXERCISES
1. A child is prescribed oral chloral hydrate (Triclofos) 250mg. Stock available is syrup chloral hydrate
200mg in 5 ml.
2. Prescription is oral phenobarbitol (phenobarbitone) 45mg. Stock available is 15mg in 5ml.
3. The child is prescribed 75 mg IV Metronidazole (Flagyl). Stock available is 100mg in 20ml.
4. Oral paracetamol 80mg is prescribed. Stock available is paracetamol syrup 120mg in 5ml
5. Awg Azlan, a 3 year old boy is having fever, his body temperature is 38.5º C. He was prescribed
10mg/kg of oral Paracetamol syrup. Stock available is 120mg/5ml. His weight is 15kg. Calculate the
amount of paracetamol syrup to be given to Awg Azlan in a single dose.
Page 4 of 7
Name:
Index No:
DRUG CALCULATION FOR CHILDREN
FEBRUARY, 2009
6. Mohd Danial, a 6 years old boy with c/o abdominal pain. The doctor prescribed him 25mg/kg/day of
Mefenamic acid (Generic name)/ Ponstan (Trades name) syrup. His weight is 22kg. Stock available is
50mg/5ml. Calculate how many mls of a single dose of Ponstan syrup will be given to the child if he
is prescribed tds?
7. Farah, a 4 year old girl with h/o fall & sustaining head injury is going for a CT Scan of the brain. The
doctor ordered Phenergan syrup (Trades name)/ Promethiazine (Generic name) 12.5 mg to be given
to her 30 minutes before procedure. Stock available is 5mg/5ml. Calculate the amount of Phenergan
syrup that will be given to this child?
8. Sheila, a 2 year old girl with URTI is prescribed 40mg/kg/day of erythromycin syrup tds. Her weight
is 12kg. Calculate the amount of erythromycin syrup that will be given to Sheila if the stock available
is 100mg/2.5ml?
Page 5 of 7
Name:
Index No:
DRUG CALCULATION FOR CHILDREN
FEBRUARY, 2009
9. Rina, a 3 year old girl came to Accident & Emergency Dept with h/o febrile convulsion. The doctor
prescribed her rectal diazepam 5mg. Stock available is 4mg/ml. Calculate the amount of rectal
diazepam that should be given to the child?
10. Abdul Malik, a 1 year old boy with otitis media is ordered Augmentin (Amoxillin) 20mg/kg/day qds.
Abdul Malik weighs 10kg. Augmentin available in hand is 125mg/5ml. Calculate the amount that you
would give for a single dose of Augmentin to the child?
11. Calculate the amount of pre-medication dose of 45 mg of IM Pethidine injection to be administered to
a child when the stock ampoule contain 50mg/ml.
Page 6 of 7
Name:
Index No:
DRUG CALCULATION FOR CHILDREN
FEBRUARY, 2009
12. Yusof, a 3 year old boy with asthma is ordered 15mg of prednisolone daily. Prednisolone syrup
contains 5mg/ml. Calculate the amount in mls that you would give to Yusof?
13. Aida, an epileptic child weighing 18kg is ordered Sodium Valproate or Epilim syrup bd. Stock
available is 200mg/5ml. The dosage for the child is 20mg/kg/day. Calculate the amount of Epilim
syrup to be given to Aida in a single dose?
14. Shanti, an 8 year old girl with asthma is admitted to Ward 2. She was prescribed IV Hydrocortisone
injection 25mg. Stock available in the ward is 50mg/ml. Calculate the required amount.
Page 7 of 7