Question

You wish to order penicillin VK for little Jerry who weighs 35 lbs. The recommended dosage is 56 mg/kg/day divided into 4 doses for 10 days. You plan to use Pen VK 125mg/5ml. How much should he receive for each dosage? Also write a prescription for it.

2. Paul is an 11-month-old who you want to prescribe a corticosteroid. His weight is 14 pounds, 6 ounces. You will prescribe Pediapred 6.7 mg/5ml. You wish to give 2 mg/kg/day in three divided dosages for 5 days. What will you order? Also write a prescription for it.

3. Andrew is a 2-year-old who you want to prescribe amoxicillin. He weighs 12.5 kilograms pounds. You will use amoxicillin 250mg/5 ml. You want to give 50mg/kg/day in three divided doses for 10 days. Also write a prescription for it.

4. Polly weighs 45 pounds. You want to give her amoxicillin/clavulanate (Augmentin). The recommended dosage is 20 mg/kg/day of amoxicillin in three divided doses for ten days. You will use 200mg amoxicillin/28.5mg clavulanate/ 5 ml. Calculate the dosage based on the amoxicillin component. Also write a prescription for it.

5. Karen weighs 29 pounds. You want to order Zithromax, 10mg/kg/d for day 1 then 5 mg/kg/day on days 2 through 5. You will use 200mg/5ml. What will you order? Also write a prescription for it.

6. James is a 4-year-old who weighs 35 kilograms. You want to prescribe erythromycin for him. You will use erythromycin 400 mg/5ml. The dosage is 50mg/kg/day in 4 divided dosages for 14 days. What will you order? Also write a prescription for it.

7. Mia is a 5-year-old who weighs 65 pounds. You want to order clarithromycin 250 mg/5 ml for her. The dosage is 15 mg/kg/day in two divided dosages for 10 days. What will you order? Also write a prescription for it.

8. Jerry is newly retired and complaining of insomnia. He is 66-years-old and weighs 210 pounds. What medication and dose would you prescribe for him. Also write a prescription for it.

9. Betty returns for a follow-up visit. She is 71 years of age and 97 pounds in general good health. Her digoxin blood level is 2.9. What is your plan of care?

Answer 1

1. Recommended dose 56 mg/kg/day into 4 doses for 10 days.

You plan to use Pen VK 125mg/5ml

Patient weights 35 lbs(15.876 kg)

So, Jerry should receive 889mg/day

56mg/kg x 15.876kg = 889mg/day

After dividing it into 4 doses, Jerry will receive 222mg/dose

You have a pen that contains 125mg/5ml, means 25mg/ml

222mg + 25mg/ml = 8.9ml

Jerry will receive 8.9ml per dose.

Answer - Administer 8.9ml per dose.

Inj penicillin VK(pen) 8.9ml QDS $\times$ 10 days

or

Inj penicillin VK(pen) 222mg QDS $\times$ 10 days