What are the effects and side effects of using L Carnitine IM? L Carnitine HCL 2000mg 5ml Injection, 5 Vials at 800 piece in Ghaziabad ID: 2853223343555 I get asked so many questions about my pre workout combo, so here it is! I take Oxyshred + Acetyl L Carnitine. This combo gives me the energy I need to crush my workouts L Carnitine Injection HOMEKIT ORAL VS. INJECTABLE L CARNITINE , Does it really matter which you use? , Both have pros and cons but it really comes down to what is going to be most suited to use as an individual athlete.,