A subcutaneous injection is given into fat and loose connective tissue underlying the dermis. This route is used for administering small doses of non-irritating, water soluble substances. Subcutaneous tissue is not richly supplied with blood vessels, so medication is absorbed slowly. For this reason, it is the preferred route for administration of medications that require a slow and steady release into the blood stream. Examples of medications commonly delivered via this route include insulin and low molecular weight heparins. Some medications may be supplied in a pre-filled syringe and needle system.
Once you have watched this video, why not attempt the multiple choice quiz to test your knowledge?