L Carnitine Intramuscular shot ELIXR IV Therapy Intramuscular vs. Subcutaneous Injections: What's the Difference? Intramuscular (IM) shots go deep into the muscle for faster absorption, while subcutaneous (SubQ) injections are placed just under the skin for slower, more sustained L Carnitine Injections A Learning Experience TRT T Nation by Biotest The Best IV Vitamins Infusion Therapies: IV Drip Injections Prices Calgary, AB