Intramuscular injection, also known as intramuscular injection, or intramuscular injection, is a method of medication administration. It is often used in hospitals when treating patients or giving vaccinations. The abbreviation for intramuscular injection is im or IM, and doctors often use foreign languages in clinical work, including Latin and English abbreviations instead of Chinese characters to describe the use of drugs, such as oral abbreviation for po, intravenous abbreviation for iv, once daily abbreviation for qd, twice daily abbreviation for bid, three times daily abbreviation for tid, every eight hours abbreviation for q8h, every twelve hours abbreviation for q12h, etc. If a doctor prescribes a medication to a patient and the prescription or doctor’s orders use (q8h, im), the nurse knows when she sees it that she has to give it to the patient intramuscularly, three times a day, and is required to do so every eight hours.