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 1 GM 5 ML ( L CARNITINE ) 5 X 5 ML IV USE AMPOULES GLP 1 with L Carnitine, B12, and B6 Reduce Nausea and Fatigue L Carnitine Injection Levocarnitine IV L Carnitine injections for boosted daily energy