A subcutaneous (sub-Q) injection is a shot that delivers medicine into the layer of fat between the skin and the muscle. This type of injection can be given by a healthcare professional, or a patient can self-inject.

Body Tissue Layers
Skin layers
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Injection Sites
Insulin Injection Sites
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Some medicines need to be injected because they are not effective if taken by mouth. Subcutaneous injections are an easy way to deliver this type of medicine. Examples of medicines given by sub-Q injection include:

  • Insulin for people with diabetes
  • Low molecular weight heparin (such as enoxaparin) to prevent blood clots