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Order: Cloxacillin 100 mg PO q8h for a child who weighs 39 lb.

The recommended daily dosage is 20-40 mg/kg/day every 8 hours. Cloxacillin is available at 125 mg/5 mL.

a. Child's weight: 17.7 kg

b. Recommended minimum daily dosage:
\[20 \, \text{mg/kg/day} \times 17.7 \, \text{kg} = 354 \, \text{mg/day}\]

c. Recommended minimum single dosage:
\[354 \, \text{mg/day} \div 3 \, \text{doses/day} = 118 \, \text{mg/dose}\]

d. Recommended maximum daily dosage:
\[40 \, \text{mg/kg/day} \times 17.7 \, \text{kg} = 708 \, \text{mg/day}\]

e. Recommended maximum single dosage:
\[708 \, \text{mg/day} \div 3 \, \text{doses/day} = 236 \, \text{mg/dose}\]

f. Is the dosage ordered safe?
No, the order is for 100 mg; the range is 118-236 mg/dose.

g. If the dosage ordered is safe, calculate the dose:
No, the order is not safe due to underdosing.

Answer :

Final answer:

The calculated dosage range for the child's weight is 118-236 mg per dose. The ordered dose of 100 mg is lower than this, indicating potential underdosing, and hence is unsafe.

Explanation:

The question involves calculating the appropriate dosage of cloxacillin according to a child's weight in kilos. Given the weight of the child is 39lb, that translates to 17.7 kg. The recommended dosage range for Cloxacillin is 20-40 mg/kg/day, divided every 8 hours.

To calculate minimum and maximum dosage limit:

  1. Minimum daily dosage: 20 mg/kg/day x 17.7 kg = 354 mg/day
  2. Minimum single dosage (divided into 3 doses every 8hrs): 354 mg /3 = 118 mg/dose
  3. Maximum daily dosage: 40 mg/kg/day x 17.7 kg = 708 mg/day
  4. Maximum single dosage (divided into 3 doses every 8hrs): 708 mg /3 = 236 mg/dose

The ordered dose of 100 mg is below the calculated minimum dosage of 118 mg/dose, making the ordered dose unsafe due to potential underdosing. Therefore, no dosage calculation should proceed since it it's not within the safe dosage range.

Learn more about Medication Dosage Calculation here:

https://brainly.com/question/36437255

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