Pharmacy Science And Calculations Sessions 1-6 Practice Test

Where are intradermal injections delivered?

Into the fat layer under the skin Into the dermis, just below the epidermis Deep into the skeletal muscle Into the large proximal veins

Correct Answer:

Into the dermis, just below the epidermis

Explanation:

Intradermal injections are placed into the dermis, the skin layer just beneath the outermost epidermis. This thin, highly vascular layer is rich in antigen-presenting cells, which is why it’s used for tests like skin tests and for delivering very small volumes of solution. Depositing into the fat under the skin would be a subcutaneous injection, going deeper into muscle would be intramuscular, and injecting into a vein would be intravenous. So the dermis, just below the epidermis, is the correct site for intradermal administration. A tiny amount with a fine needle often produces a small wheal, confirming proper placement.

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