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Drug calculations sample question.

A drug is presented as 5 g in 500 ml A patient weighing 70 kg is prescribed 10 mg/kg/h of the drug.

1 How many milligrammes per hour of the drug does the patient need?

2 How many millilitres per hour do you set the infusion pump?

To first work out how much of the drug the patient requires according to their body weight we use the formula weight (kg) × dose, and then using the formula:

But remember to keep the decimal units the same throughout the formula.