Which abbreviation indicates dosing twice daily?

Which abbreviation indicates dosing twice daily?

• A. qhs
• B. bid
• C. q8h
• D. q2h

Answer: (B)

Dosing twice daily is indicated by bid, which stands for bis in die. This means two doses in a 24-hour period, typically spaced about 12 hours apart unless the clinician specifies otherwise. In contrast, qhs means every night at bedtime (once daily), which is not twice daily. q8h means every eight hours, resulting in about three doses per day. q2h means every two hours, equating to roughly a dozen doses in a day. So bid best fits the requirement of twice-daily dosing.

Dosing twice daily is indicated by bid, which stands for bis in die. This means two doses in a 24-hour period, typically spaced about 12 hours apart unless the clinician specifies otherwise.

In contrast, qhs means every night at bedtime (once daily), which is not twice daily. q8h means every eight hours, resulting in about three doses per day. q2h means every two hours, equating to roughly a dozen doses in a day. So bid best fits the requirement of twice-daily dosing.