
The 12 month old child weighing 11 LB would receive 1.3 mL of the gentamycin sulfate and the best site for the injection would be the vastus lateralis muscle.
This was calculated by taking the child's weight and multiplying it by the desired dosage in milligrams, 13mg.
The pharmacy has 20mg/2ml on hand. Using the required data we get,
11 lb = 4.99 kg
13 mg x 4.99 kg = 64.87 mg
64.87 mg / (20 mg/2ml) = 1.3 ml
In order to get the desired dosage, 1.3ml of gentamicin sulfate will need to be given.
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