45. A prescription states "Take 2 tsp q.i.d.,dispense 20 doses." What volume,in mL,should be dispensed?
Answer: B
The volume to be dispensed is 200 mL.
To determine the total volume to be dispensed, we multiply the dose by the frequency and the number of doses. In this case, taking 2 teaspoons four times a day for 5 days results in a total volume of 200 mL.
A) 120
This option is incorrect because it underestimates the total volume required. If 2 teaspoons are taken four times a day, over 5 days, the total would exceed 120 mL.
B) 200
This option is correct as it accurately reflects the calculation of the total volume. Taking 2 teaspoons (10 mL) four times a day equals 40 mL per day, and for 5 days, this totals to 200 mL.
C) 240
This option is incorrect because it overestimates the total volume. The calculation does not support a total of 240 mL based on the prescribed dosage and frequency.
D) 800
This option is incorrect as it significantly overestimates the volume required. The prescribed regimen does not lead to a total of 800 mL when calculated correctly.
Conclusion
The correct answer of 200 mL is derived from the precise calculation of the dosage prescribed. All other options fail to accurately reflect the volume based on the 2 teaspoons taken four times a day over the specified duration. Thus, option B is definitively the correct choice.