What is the meaning of 'ID' in terms of an injection method?

The term 'ID' in the context of injection methods stands for 'Intradermal.' This technique involves injecting a small volume of medication into the dermis, which is the layer of skin just beneath the outer epidermis. This method is often used for allergy tests or tuberculosis screening, as it allows for a localized response to the injected substance. The use of intradermal injections is characterized by the formation of a small wheal or bump at the injection site, which is visible and serves as an important indicator of the test result or the effectiveness of the medication.

Intradermal injections are distinct from other injection methods such as intramuscular (IM) or subcutaneous (SubQ), and it's important to be familiar with these distinctions for proper medication administration.