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Pediatric Dosage Calculations Worksheet with Key, Exercises of Mathematics

Calculate pediatric dosage in given cases, see results on last page.

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Pediatric Dosage Calculations
Technical Math
Pediatric Dosage
1) Calculate the single dose for a child weighing 18 kg. The C.P.S. states that Theophylline
can be administered 5 mg/kg q.8h.
2) The C.P.S. states that a child’s does of Acetaminophen(Tylenol) elixir is 10 mg/kg q6h.
The child weighs 8 kg. Calculate a safe single dose.
3) The C.P.S states that Phenytoin( Dilantin) can be administered 5 mg/kg/day. The child
weights 15 kg. What would be a safe daily dose of Phenytoin?
4) Mary is 11 years old and weighs 34.5kg. The doctor has ordered Erythromycin 345 mg
po q6h for respiratory infection. The C.P.S states that the recommended dose is 20-50
mg/kg/day in 4 divided doses.
(a) Calculate the minimum and maximum total daily dose for Mary.
(b) Is Mary’s dose of Erythromycin 345 mg po q6h within the recommended range?
5) Tylenol elixir is ordered po q4h prn for pain. The recommended dose for a child < 10
years old is 10 -15 mg /kg/dose not to exceed 65 mg/kg/day and for an adult or a child
> 10 years old is 325-650 mg q4h prn, not to exceed 4g/day.
(a) What is the safe single minimum and maximum dose for Mary, age 7 years and
weighing 22.5 kg?
(b) James, age 3 years weighs 12.6 kg and is ordered Tylenol 100 mg. Is this dose
acceptable?
(c) Julie age 11, is ordered 480 mg of Tylenol po q4h. She weights 34.5 kg. Is this
dose within the recommended range?
6) What would be the recommended single dose of Amoxicillin for a child weighing 16 kg?
Usual pediatric dose is 40 mg/kg/day in 4 divided doses.
7) The suggested dosage of tobramycin (Nebcin) is 4 mg/kg/day for a neonate who weighs
3 kg. If the dosage must be divided and given every 12 hours, how many milligrams will
the child receive in each dose?
8) A doctor prescribes 7.5 mg/kg of amikacin(Amikin) every 12 hours for a 4 kg infant. How
many milligrams of the drug will be the infant receive each day?
9) If the suggested dosage of chloramohenicol(Chloromycetin) is 50 mg/kg/day in divided
doses every 6 hours, how many milligrams should the nurse give at each dose to a 17 kg
child?
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Technical Math

Pediatric Dosage

  1. Calculate the single dose for a child weighing 18 kg. The C.P.S. states that Theophylline can be administered 5 mg/kg q.8h.

  2. The C.P.S. states that a child’s does of Acetaminophen(Tylenol) elixir is 10 mg/kg q6h. The child weighs 8 kg. Calculate a safe single dose.

  3. The C.P.S states that Phenytoin( Dilantin) can be administered 5 mg/kg/day. The child weights 15 kg. What would be a safe daily dose of Phenytoin?

  4. Mary is 11 years old and weighs 34.5kg. The doctor has ordered Erythromycin 345 mg po q6h for respiratory infection. The C.P.S states that the recommended dose is 20- mg/kg/day in 4 divided doses.

(a) Calculate the minimum and maximum total daily dose for Mary. (b) Is Mary’s dose of Erythromycin 345 mg po q6h within the recommended range?

  1. Tylenol elixir is ordered po q4h prn for pain. The recommended dose for a child < 10 years old is 10 -15 mg /kg/dose not to exceed 65 mg/kg/day and for an adult or a child

10 years old is 325-650 mg q4h prn, not to exceed 4g/day.

(a) What is the safe single minimum and maximum dose for Mary, age 7 years and weighing 22.5 kg? (b) James, age 3 years weighs 12.6 kg and is ordered Tylenol 100 mg. Is this dose acceptable? (c) Julie age 11, is ordered 480 mg of Tylenol po q4h. She weights 34.5 kg. Is this dose within the recommended range?

  1. What would be the recommended single dose of Amoxicillin for a child weighing 16 kg? Usual pediatric dose is 40 mg/kg/day in 4 divided doses.

  2. The suggested dosage of tobramycin (Nebcin) is 4 mg/kg/day for a neonate who weighs 3 kg. If the dosage must be divided and given every 12 hours, how many milligrams will the child receive in each dose?

  3. A doctor prescribes 7.5 mg/kg of amikacin(Amikin) every 12 hours for a 4 kg infant. How many milligrams of the drug will be the infant receive each day?

  4. If the suggested dosage of chloramohenicol(Chloromycetin) is 50 mg/kg/day in divided doses every 6 hours, how many milligrams should the nurse give at each dose to a 17 kg child?

Version 1.

The Math Centre

Technical Math

  1. If the suggested dosage of thioridazine(Mellari) is 1.5mg/kg/day, how many milligrams would the nurse administer daily to a 16 kg child?

  2. A child who weighs 28 kg needs to receive demeclocycline hydrochloride (Declomycin) 280 mg PO daily in two divided doses. How many milligrams should be patient receive with each dose? If the recommended daily dosage range is 6 to 12 mg/kg, does the prescribed dose fall within the range?

  3. The doctor orders carbamazepine(Tegretol) 900 mg PO daily in four divided doses for a pediatric patient with seizures who weighs 30 kg. How many milligrams of the drug should the patient receive with each dose? The recommended dosage range is 10 to 20 mg/kg PO daily. Does the prescribed dose fall within this range?

  4. An infant who weighs 4 kg must receive penicillin V potassium, 35 mg IV every 4 hours. According to the package insert the recommended dosage range is 15 to 56 mg/kg daily in six divided doses. Does the prescribed dosage fall within them recommended range?

  5. A child who weighs 75 lb needs to receive a loading dose of phenytoin (Dilantin), 15 mg/kg IV. How many milligrams of the drug should the child receive?

  6. The doctor’s order reads administer erythromycin stearate 30 mg/kg PO daily in divided doses q6h. How many milligrams should an 18-kg pediatric patient receive with each dose?

  7. A child who weighs 30 kg is to receive ampicillin 50 mg/kg/day. What is total daily dosage for this patient?

Version 1.8 The Math Centre