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 TACOMA VET MEDICATIONS Compounded Carnitine (L) Injection Empower Pharmacy L CARNITINE 1 GM 5 ML ( L CARNITINE ) 5 X 5 ML IV USE AMPOULES Lacarnit Injection 5 ml Uses, Side Effects, Price Apollo Pharmacy