L Carnitine Injection HOMEKIT 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 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 Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust Infusions Injections with L Glutamina Quantica720 How to Self Administer Subcutaneous & Intramuscular Injections