On a prescription, "bid" denotes taking medication twice daily. This abbreviation comes from the Latin term "bis in die," translating to "twice a day." It can appear in various forms such as "bid," "BID," or "b.i.d." Regardless of the format, it is part of a series of traditional Latin abbreviations used to indicate how often medicines should be administered.Some other examples include:- "q.d." (or "qd" or "QD") means once daily, originating from the Latin phrase "quaque die."- "t.i.d." (or "tid" or "TID") signifies three times daily, derived from "ter in die" in Latin.- "q.i.d." (or "qid" or "QID") indicates four times a day, from the Latin "quater in die."When a medication is prescribed to be taken at specific hourly intervals, it is written as "q_h," where "q" stands for "quaque," meaning "every," and "h" specifies the number of hours. For instance, "2 caps q4h" means "Take 2 capsules every 4 hours."
