49. The same total number of daily doses is indicated by both abbreviations in which of the following pairs?
Answer: C
b.i.d. and q12h indicate the same total number of daily doses.
Both b.i.d. (bis in die) and q12h (every 12 hours) represent a dosing schedule that results in two doses per day.
A) t.i.d. and q6h
t.i.d. (ter in die) means three times a day, while q6h indicates every six hours, which also results in four doses per day. Therefore, this pair does not indicate the same total number of doses.
B) q.i.d. and q8h
q.i.d. (quater in die) denotes four times a day, while q8h means every eight hours, which results in three doses per day. This pair also does not indicate the same total number of doses.
C) b.i.d. and q12h
Both b.i.d. and q12h refer to a regimen of two doses per day. b.i.d. means taking a medication twice a day, while q12h indicates administering the medication every twelve hours, which aligns perfectly with the same dosage frequency.
D) q.o.d. and q4h
q.o.d. (quaque altera die) means every other day, resulting in one dose every two days. In contrast, q4h indicates administering a dose every four hours, which amounts to six doses in one day. Thus, this pair does not indicate the same total number of doses.
Conclusion
The correct answer is C, as both b.i.d. and q12h result in two doses daily, demonstrating the same total number of doses. The other options fail to show equivalency in dosage frequency, making them incorrect in this context. Understanding these dosing abbreviations is crucial for proper medication administration.