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 3000 Southern Nutrition Subcutaneous Syringes (30 ct.) IV Me Now FL You can come see us every week if you want for weekly injections but we also teach you how to safely self injection , subq (fat tissue)injections if you prefer to do it at home!