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 Injection HOMEKIT Local Anesthetic Systemic Toxicity NYSORA Pharmacokinetics of L Carnitine Clinical Pharmacokinetics Springer Nature Link L carnitine protects cardiac damage by reducing oxidative stress and inflammatory response via inhibition of tumor necrosis factor alpha and interleukin 1beta against isoproterenol induced myocardial infarction ScienceDirect Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports