L Carnitine Injection at 8000 piece L Carnitine IV Injection in Belgaum ID: 2851546498373 Ultra Lipotropic 10 Injections Intramuscular Syringes (30 ct.) IV Me Now FL 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 Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust How to draw up and give yourself a subcutaneous injection