How to Self Administer Subcutaneous & Intramuscular Injections 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 Intramuscular shot ELIXR IV Therapy Maximize Your Weight Loss Journey with Semaglutide and L Carnitine Injections Aesthetics 360 Lash & MedSpa L Carnitine Injection (Intramuscular): How It Works & What to Expect Mesotherapy Cocktails, Exosomes Regenerative Skin Boosters Semaglutide With B12 For Weight Loss Seattle & Tacoma