How many mL of a parenteral solution containing 40 mg triamcinolone per mL should be used toprepare the following prescription?Rx Triamcinolone 0.05%Ointment base ad 120 g
Question
How many mL of a parenteral solution containing 40 mg triamcinolone per mL should be used toprepare the following prescription?Rx Triamcinolone 0.05%Ointment base ad 120 g
Solution
To solve this problem, we need to convert the percentages to the same units and then use the formula for dilution. Here are the steps:
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Convert the prescription from percentage to mg/g: 0.05% is equivalent to 0.05g/100g, which is 0.5mg/g.
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Calculate the total amount of triamcinolone needed: 0.5mg/g * 120g = 60mg.
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Calculate the volume of the parenteral solution needed: 60mg / 40mg/mL = 1.5mL.
So, 1.5mL of the parenteral solution containing 40mg/mL triamcinolone should be used to prepare the prescription.
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