Practice problems

# Question
1 The recommended dose of a drug is 2.5 ml/kg. How many tablespoonful’s will a patient weighing 270 lb need? (Round down if necessary)
2 The pediatric dose for ampicillin is 100 mg/kg/day. How many ml of an injection containing 500 mg/ 10 ml should be administered to a child weighing 12.5 kg?
3 CR, is a female patient who weighs 94 kg and is 160 cm tall. She is being treated with digoxin. The dose of digoxin is based on IBW. What is the patient dose in μg , if digoxin dose is 23.5 μg/kg?
4 The pediatric dose of a drug is 350 mg/m2. Using the nomogram method, calculate the dose for a child weighing 30 kg and measuring 67 cm.
5 If the adult dose of a drug is 250 mg/m2, using the Mostellar equation, calculated the dose for a patient weighing 179 lb and measuring 4' 11"
6 The recommended adult dose of a drug is 100 mg/day. What should be the dose for a patient with BSA of 1.8 m2?
7 Using the nomogram method, calculate the dose of doxurubin 180 mg/m2 for a patient who weighs 81 kg and is 174 cm tall.
8 A 84 year old female patient is prescribed an antiarrhythmic drug at a dose of 500 μg PO q 12h. The patient serum creatinine is 2.70 mg/dl, she weighs 155 lb and measures 5' 1". The following are dosing guidelines for the drug
CrCl (ml / min) Drug Dose
> 60 500 μg PO q 12h.
40 - < 60 250 μg PO q 12h.
20 - < 40 125 μg PO q 12h.
<= 20 Contraindicated
a) What is the patient’s calculated creatinine clearance?
b) What dose would you recommend?
9 VAD is a combination of three chemotherapy drugs used to treat myeloma. A 306 lb, 5 feet 1 inches patient receives the following regimen:
Cycle: 28 days
Vincristine 0.4 mg/day IV on days 1 through 4
Doxorubicin 9 mg/m2/day IV on days 1 through 4
Dexamethasone 40 mg/day PO on days 1-4, 9-12, 17-20

Calculate the total quantity of each drug required per cycle. (use the nomogram method to calculate the BSA)
10 AC regimen is a combination of two chemotherapy drugs used to treat Breast cancer. A female patient with a BSA of A 1.7 m2 receives the following regimen:
Cycle: 3 weeks, repeat 4-6 cycles
Doxorubicin: 60 mg/m2/day IV on day 1
Cyclophosphamide: 600 mg/m2/day IV on day 1
Calculate the total quantity of each drug required in 2 cycles.
11 When using a dropper you find that 68 drops of a mixture measure 7 ml. How many drops/ml is the dropper calibrated to deliver?
12 A patient drops off a prescription for prednisone. The prescription calls for:
Week 1: 60 mg PO q day
Week 2: 40 mg PO q day
Week 3: 30 mg PO q day
Week 4: 30 mg PO q day
How many 20 mg tablets would provide for the 4 week treatment?
13 Children’s Ibuprofen suspension is available as 100 mg/5 ml. Dose for a 24 lb child is 5 ml. The dropper contains 15 drops/ml. How many drops is the child taking per dose?
14 A 3.25 g of sample of drug contains 250 doses. What is the dose of drug in mg?
15 The recommended dose of a cough syrup of 0.5 teaspoon , how many doses are contained in an 8 fluid ounce bottle? (Round down if necessary)
16 Calculate the volume of U-500 required to administer 2000 units of insulin.
17 The content of a vial of penicillin G potassium weighs 300 mg and represents 1000000 units. How many milligrams are needed to prepared 40 g of an ointment that is to contain 23000 units of penicillin G potassium per gram?

Answers

The Answer to question 1 is: 20

The Answer to question 2 is: 25.00 ml

The Answer to question 3 is: 1231.40 μg

The Answer to question 4 is: 224.97 mg

The Answer to question 5 is: 460.09 mg

The Answer to question 6 is: 104.05 mg

The Answer to question 7 is: 352.49 mg

The Answer to question 8 is: a) 11.70 ml/min b) Contraindicated

The Answer to question 9 is: vincristine = 1.6 mg, doxorubicin 81.55 mg, dexamethasone = 480.00 mg

The Answer to question 10 is: doxorubicin = 204 mg, Cyclophosphamide = 2040 mg

The Answer to question 11 is: 10 drops/ml

The Answer to question 12 is: 56 tablets

The Answer to question 13 is: 75 drops

The Answer to question 14 is: 13.00 mg

The Answer to question 15 is: 94 doses

The Answer to question 16 is: 4.00 ml

The Answer to question 17 is: 276.00 mg