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 Role of carnitine in disease Nutrition & Metabolism Springer Nature Link Serum L Carnitine Levels Are Associated With First Stroke in Chinese Adults With Hypertension Stroke Carnitine: the claims and why it may not work High Blood Pressure Linus Pauling Institute Oregon State University