In terms of injection types, how does subcutaneous differ from intradermal?

Subcutaneous injections are designed to deliver medication into the layer of fat beneath the skin. This method allows for a larger volume of medication to be administered compared to intradermal injections, which are given into the dermis, just under the outer layer of skin. The volume typically administered via subcutaneous routes can be as much as 1 to 2 mL, while intradermal injections are generally limited to smaller volumes, usually around 0.1 mL or less, due to the tissue's limited space and sensitivity.

The choice accurately highlights the key distinction between the two injection types regarding volume capacity. Understanding these differences is crucial, especially when considering the appropriate administration technique for various medications and the patient's comfort.