Karnitine Injection belongs to a class of medications called amino acids. It is used in the treatment of carnitine deficiency. It helps the body produce energy and improves the efficiency of body function. Karnitine Injection is generally administered by a healthcare professional. You should not self-administer this at home. It may cause injection site reactions like pain, swelling, redness that are generally mild and temporary. Karnitine Injection is usually a safe medicine, however, it may cause nausea, vomiting, and reactions at the site of injection such as swelling, redness, and pain. Your doctor may monitor your blood glucose levels regularly while you are taking the medicine. Before starting the medicine, inform your doctor if you have any other medical conditions or are taking any other medications. Patients with severe kidney disease should not take this medicine unless prescribed by the doctor.