Injectable anesthetics are medications used to induce a temporary loss of sensation or consciousness during medical procedures. They are administered through a needle, allowing for rapid onset of anesthesia. Commonly used in surgeries, these anesthetics help manage pain and anxiety, ensuring patient comfort. These drugs can be classified into two main categories: general anesthetics, which induce unconsciousness, and local anesthetics, which numb a specific area of the body. Examples include propofol for general anesthesia and lidocaine for local procedures. The choice of anesthetic depends on the type of procedure and the patient's medical history.