The medical term bid means to give a drug twice a day, and similar abbreviated forms include qd, tid, qid, etc. The abbreviation bid is a Latin abbreviation commonly used in modern medicine to express the recommended frequency of administration of the drug, most often found in doctor’s prescriptions, meaning that the drug is given twice a day. Similar abbreviations include qd (once a day), tid (three times a day), and qid (four times a day). In addition to these abbreviations, doctors usually label prescriptions with the dosage of the medication, how it is to be given, and so on. Doctors use Latin abbreviations when writing prescriptions, the main purpose of which is to issue prescriptions quickly and avoid wasting too much time on handwritten prescriptions, which may delay the patient’s treatment. Doctors usually inform patients of the specific medication in the prescription, the method of administration, and the number of times the medication is to be given, so patients do not need to be overly nervous. To summarize, bid and other abbreviations are mainly instead of textual medication instructions, if the patient does not understand the actual meaning, you need to consult the doctor in time to avoid blindly using medication on their own.