If a prescription reads: Amoxicillin 250 mg/5ml, dispense 150 ml, what is the dose in household units for 375 mg t.i.d. x 5d?

To determine the correct dosage in household units, it is essential to convert the prescribed dose from milligrams to the equivalent volume in milliliters based on the concentration provided in the prescription.

The prescription states Amoxicillin 250 mg in 5 ml. To find out how much volume corresponds to the prescribed dose of 375 mg, a proportion can be set up.

First, calculate how many milliliters would be needed for 375 mg:

1. The concentration is 250 mg/5 ml, which can be written as:

• 250 mg = 5 ml

• Therefore, 375 mg can be calculated using a cross-multiplication or scaling method.

Using a ratio:

• For 375 mg, let X be the required volume in ml.

250 mg / 5 ml = 375 mg / X ml

Cross-multiplying gives:

• 250 mg * X ml = 375 mg * 5 ml,

• 250X = 1875,

• X = 1875 / 250,

• X = 7.5 ml.

Now that we have determined that 375 mg of Amoxicillin corresponds to 7.5 ml, the next step is