Question

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example 4: single-dose range medications — maximum & minimum range
➢ example 2: gravol 25 mg im q4h prn nausea
child weighs 30 lb. is the dosage safe?
recommended dose: 1 to 2 mg/kg/dose q4h
available: gravol 50 mg per ml

Explanation:

Step1: Convert pounds to kilograms

Since 1 lb = 0.453592 kg, for a 30 lb child, the weight in kg is $30\times0.453592\approx13.61$ kg.

Step2: Calculate minimum and maximum safe doses

Minimum dose: $1\space mg/kg\times13.61\space kg = 13.61\space mg$
Maximum dose: $2\space mg/kg\times13.61\space kg = 27.22\space mg$

Step3: Compare with given dose

The given dose is 25 mg. Since $13.61\space mg\leq25\space mg\leq27.22\space mg$, the dose is within the safe range.

Answer:

The dosage of 25 mg is safe for the 30 lb child.