Are some methods of administering HRT inherently better than others? Audience requested: subcutaneous injections. Subcutaneous means under the skin. In this type of injection, a short needle is used to inject medication 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 L Carnitine Injection HOMEKIT L carnitine solution for injection 1g 5ml Help SA CPHI Online