L Carnitine Injectable: Boost Energy and Metabolism 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 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 How to Self Administer Subcutaneous & Intramuscular Injections LEVOCARNITINE INJECTION, USP1 g per 5 mL vial and 4 g per 20 mL vialFOR INTRAVENOUS USE ONLYRx Only Carnicare DuoMax L Carnitine & Taurine Supplement for Dogs Ace Canine Ace Canine Healthcare