Question

1. Write a prescription for a 46 lbs. patient that needs phenobarbital  at 15 mg/kg/day BID for 12 days. Phenobarbital is available at 1gr/tab.

2. Write a prescription for a 23 kg girl prescribed with Cefuroxime due to infection at 15mg/kg/day in 2 divided doses per day for 7 days. Cefuroxime is available in suspension 250 mg/5 mL in 50 mL bottle.

3. Give at least 12 common drug-drug interactions with their corresponding result when taken concomitantly.

Answer 1

1.

Order dose 15 mg/kg/day BID for 12 days.

Patient weights 46 lbs. (21 kg)

So, the patient needs

Available quantity 1gr/tab.

1 gr = 64 mg

so patient need

Answer - 2.5 tab (2 and a half tab) BID for 12 days.

2.

Order dose 15 mg/kg/day in 2 divided doses per day for 7 days.

Patient weights 23 kg.

So, the patient needs

250 mg/5 mL in 50 mL bottle.

so patient need

Answer - 3.5 ml BID for 7 days.