The abbreviation BID indicates a dosage to be taken:

The abbreviation BID stands for "bis in die," which is Latin for "twice a day." This abbreviation is commonly used in medical prescriptions and directives to indicate that a medication should be administered two times within a 24-hour period. Understanding medical abbreviations, such as BID, is crucial for medication administration to ensure the correct dosage schedule is followed. This helps to maintain the desired therapeutic effect of the medication while minimizing the risk of side effects due to underdosing or overdosing. Thus, BID clearly signifies that the medication should be taken twice daily.