Lidocaine hydrochloride can be injected three times in one session. Lidocaine hydrochloride is a local anesthetic. It is mainly used for peripheral block anesthesia, infiltration anesthesia, surface anesthesia and epidural anesthesia. It is also used to treat ventricular premature beats after acute myocardial infarction, digitalis intoxication, ventricular arrhythmias caused by cardiac surgery and cardiac catheterization. The medication is given as a 3-day course of treatment and is required every day of the course. The use of lidocaine hydrochloride may cause adverse reactions such as drowsiness, abnormal sensations, muscle tremors, convulsions, and coma. It may also cause low blood pressure and slow heartbeat in some patients. When blood levels are too high, it can also lead to slowed atrial conduction, atrioventricular block, depression of heart muscle contractility, and decreased cardiac output. Remember not to use in patients who are allergic to lidocaine hydrochloride. Patients should use it under the guidance and advice of a medical professional. Do not use without permission to avoid adverse reactions.