Amoxicillin Dosage Calculation

How do we calculate the amount of liquid preparation containing 625 mg of amoxicillin?

Amoxicillin 625 mg PO is ordered. Supplied as liquid preparation containing 250 mg in 5 mL, how much should be administered?

Answer:

To achieve a dosage of 625 mg of amoxicillin, 12.5 mL of the liquid preparation should be administered.

Explanation: To determine how much of the liquid preparation should be administered, we need to calculate the amount of mL containing 625 mg of amoxicillin. Given that the liquid preparation contains 250 mg in 5 mL, we can set up a proportion:

250 mg / 5 mL = 625 mg / x mL

Cross-multiplying and solving for x, we get:

x = (625 mg * 5 mL) / 250 mg = 12.5 mL

Therefore, 12.5 mL of the liquid preparation should be administered to achieve a dosage of 625 mg of amoxicillin.

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