What type of injection is given just under the epidermis?

The type of injection that is administered just under the epidermis is the intradermal injection. This method involves delivering a small volume of medication directly into the dermis, which is the layer of skin just beneath the outer layer (epidermis). It is typically used for allergy tests, tuberculosis screening (like the Mantoux test), or certain vaccinations because it allows for a localized immune response.

Intradermal injections require a careful technique to ensure the needle is angled properly to deposit the medication within the dermis, rather than deeper into subcutaneous or muscle tissues. The formulation and dosage for intradermal injections are often smaller than other types because the injection is intended for absorption at a localized, superficial level within the skin.

The other types of injections mentioned are administered in different layers of tissue: intramuscular injections are delivered into the muscle, intravenous injections are given directly into the bloodstream via a vein, and subcutaneous injections are administered into the layer of fat and tissue just beneath the skin, but above the muscle.