Subcutaneous Injection: What It Is and How to Give One Benefits of L carnitine injections are aplenty! This injection is a great way to boost your energy levels, help with weight management, and even promote healthy heart function. Studies show that 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 (Cartin) Delex Pharma Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust L carnitine Injection 1g, 2g Liquid Form, Safe Chemical Ingredients, Balanced Cholesterol, Muscle Building, 36 Months Shelf Life at Best Price in Shijiazhuang Hebei Mepha Co. Ltd.