L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you L Carnitine Linus Pauling Institute Oregon State University How to Self Administer Subcutaneous & Intramuscular Injections L Carnitine Injection Levocarnitine IV The Role of L Carnitine in Distance Athletes The Effect of L Carnitine on Critical Illnesses Such as Traumatic Brain Injury (TBI), Acute Kidney Injury (AKI), and Hyperammonemia (HA)