Adult health (medication calculation)

A child weighing 11 lb is ordered phenytoin 15 mg po every 12 hours.  The recommended dosage is 4 to 8 mg/kg/day  The medication is to be given in divided doses every 12 hours.  The drug is supplied as phenytoin oral suspension 125 mg/5 mL.

Answer the following questions.

What is the child's weight in kg?

What is the recommended daily dosage range for this child?

According to the instructions, what would be the recommended individual dosage range for this child?

Is the ordered dose safe for this child?

If it is, how much will the nurse administer?

Questions2

Vancomycin 200 mg IV q6h is ordered for a child weighing 38 lb.  The recommended dosage of vancomycin for a child is 40 mg/kg/day in 4 divided doses.  Answer the following questions.

What is the child's weight in kg?

What is the recommended  daily dose for this child?

What is the recommended divided (individual) dose for this child?

Is the ordered dosage safe for this child?