When to take L carnitine: Dosage, forms, and side effects Burn Bundle MICC & L Carnitine Injections for Fat Burn & Energy Olympia Pharmacy L Carnitine Injection Levocarnitine IV What Are L Carnitine Injections Used For? 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