Question

a pharmacy technician receives a prescription for amoxicillin (amoxil) 250 mg/5 ml. the patient is prescribed to take 2.5 ml by mouth twice daily. which of the following are the individual and total daily doses of this medication?
○ 250 mg; 500 mg
○ 75 mg; 150 mg
○ 125 mg; 250 mg
○ 150 mg; 300 mg

question 5
1 point
how many ml of cefazolin 500 mg/ml should a pharmacy technician use to prepare a syringe that contains 1 g of cefazolin?
○ 8 ml
○ 2 ml
○ 4 ml

Explanation:

First Question (Amoxicillin Dosing)

Step1: Find mg per mL

The concentration is 250 mg/5 mL. To find mg per mL, calculate $\frac{250\ \text{mg}}{5\ \text{mL}} = 50\ \text{mg/mL}$.

Step2: Calculate individual dose

The patient takes 2.5 mL per dose. Multiply mL by mg/mL: $2.5\ \text{mL} \times 50\ \text{mg/mL} = 125\ \text{mg}$ (individual dose).

Step3: Calculate total daily dose

The patient takes the dose twice daily. So, $125\ \text{mg} \times 2 = 250\ \text{mg}$ (total daily dose).

Step1: Convert grams to milligrams

We know that $1\ \text{g} = 1000\ \text{mg}$.

Step2: Use concentration formula

The concentration is 500 mg/mL. The formula for volume $V$ is $V=\frac{\text{Mass}}{\text{Concentration}}$. Substitute mass = 1000 mg and concentration = 500 mg/mL: $V = \frac{1000\ \text{mg}}{500\ \text{mg/mL}} = 2\ \text{mL}$.

Answer:

125 mg; 250 mg

Second Question (Cefazolin Volume)