Amazon.com: Nutrex Research L Carnitine 3000 (31 Servings, Berry Blast) Liquid Shots, Stimulant Free Supports Muscle Recovery For Men and Women : Health & Household L CARNITINE 1 GM 5 ML ( L CARNITINE ) 5 X 5 ML IV USE AMPOULES 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 Injectable L Carnitine How It Works & What to Expect? LEVOCARNITINE INJECTION, USP1 g per 5 mL vial and 4 g per 20 mL vialFOR INTRAVENOUS USE ONLYRx Only