17. A prescription reads: Famotidine 40 mg/5 mL 50 mL Sig: 0.4 mL PO t.i.d. What amount of medication, in mg, is given each day?
Answer: D
9.6 mg of medication is given each day.
The prescription indicates that 0.4 mL of Famotidine is to be taken three times a day (t.i.d.). Given the concentration of the medication is 40 mg per 5 mL, the total daily dosage can be calculated based on this information.
A) 1.2
This option is incorrect. If 0.4 mL is taken three times a day, it would total 1.2 mL, but this does not correspond to the correct calculation of the daily dosage in mg.
B) 3.2
This option is also incorrect. While 3.2 mg may seem plausible, it does not accurately represent the total daily dosage based on the prescribed volume and concentration of Famotidine.
C) 6.4
This option is incorrect as well. The calculation leading to 6.4 mg does not align with the total daily dosage derived from the prescribed volume of 0.4 mL taken three times a day.
D) 9.6
This is the correct option. The total daily dosage is calculated as follows: 0.4 mL per dose, three times a day equals 1.2 mL per day. Since the concentration is 40 mg per 5 mL, we find that 1.2 mL contains 9.6 mg of medication (1.2 mL * 40 mg/5 mL = 9.6 mg).
Conclusion
The correct answer is 9.6 mg, which is derived from the prescribed dose and the concentration of the medication. All other options fail to accurately reflect the calculations needed to determine the correct daily dosage based on the prescription given. Thus, option D conclusively represents the total amount of Famotidine administered daily.