Practice Math Problems for NURS A324
1. The order is for Amoxil 60 mg PO every 8 hours. The child weighs 20 pounds.
The Amoxil is supplied 125mg/5ml. The safe dose 20-40 mg/kg/day is divided
doses every 8 hours.
a. Is this a safe dose?
b. How many ml will be given to the child?
2. The order is for Dilantin PO 20 mg BID. The baby weighs 12lbs. The dilantin
suspension is 30 mg/5ml. The safe dose is 4-8 mg/kg/day into two doses.
Maximum dose is 300 mg/day.
a. Is this a safe dose?
b. How much will be given to the child?
3. The order is for Gentamicin 9 mg IV every 8 hours. The Child weighs 3.6 kg.
The safe dose is 2.5 mg/kg/dose every 8 hours. The concentration is for IV
2mg/ml given over 15-30 minutes. The vial comes in 40mg/ml.
a. How much will be your initial dilution?
b. How much is your minimum dilution for IV administration?
c. If the medication is to be given over 30 minutes what would you set your
pump for the rate?
4. The order is for Cefuroxime 200 mg IV every 6 hours. The child’s weight is 14
kg. The safe dose is 50 to 100 mg/kg/24hours given every 6-8 hours.
Concentration for IV use: 50mg/ml over 30 minutes. 750mg vial…dilute with
8ml sterile water for injection to make 90mg/ml.
a. Is this a safe dose?
b. How much will be your initial dilution?
c. How much in your minimum dilution for IV administration?
d. If the medication is to be given over 30 minutes what would you set your
pump for the rate?
5. The order is for SoluMedrol IV 60 mg BID. The child is 9 years old and weighs
80 pounds. The safe dose is 0.5- 1.7 mg/kg/day divided by every 12 hours.
SoluMedrol comes in 40mg/ml.
a. Is this dose safe?
6. The order is for Augmentin 175mg po every 8 hours. The child weighs 29 lbs.
The safe dose is 40 mg/kg/day in divided doses. The bottle comes in 125mg/5ml.
a. Is this a safe dose?
b. How many mls will be given to the child?
7. The order reads for Ampicillin 83mg every 12 hours. The infant is 3 days old and
weighs 3.34 kg. The recommended dosage is 50mg/kg/day to be given every 12
hours.
a. Is this a safe dose?
b. Pharmacy send up a 1 gram vial. The insert states to dilute this with 9.6
ml of sterile water for a final dilution of 100mg/ml. How much would be
your initial dilution (how much would you draw up?)?
c. The recommended minimum/maximum concentration is 20-60 mg/ml in
D5NS to infuse over 10-30 minutes.
1. Calculate the minimum concentration for administration
2. Calculate the maximum concentration for administration
d. Calculate the rate of the minimum concentration when given over
1. 15 minutes
2. 20 minutes