What does the abbreviation "b.i.d." represent?

The abbreviation "b.i.d." stands for "bis in die," which is a Latin term that translates to "twice a day." This term is commonly used in medical prescriptions to instruct patients on how often to take their medication. It indicates that the medication should be administered or taken two times within a 24-hour period, typically spaced evenly throughout the day to maintain therapeutic levels in the bloodstream. Understanding these abbreviations is vital for accurate dosing and ensuring effective treatment regimens. The other choices represent different frequencies of administration, but "b.i.d." specifically refers to taking medication twice daily.