What is the appropriate needle gauge for intradermal injections?

Correct option is C

Intradermal injections are administered into the dermis, just below the epidermis, using fine needles to minimize tissue trauma and ensure accurate delivery. The appropriate needle gauge for intradermal injections is 24–26, which provides the right balance of thinness and control for small-volume delivery. This size helps create a visible bleb on the skin, commonly seen in tuberculin and allergy testing.
Explanation of options: (a) 19 – 23 Gauge – These are larger needles used for intramuscular or some subcutaneous injections. They are too thick for intradermal use and can cause unnecessary tissue damage. (b) 16 – 18 Gauge – These are very thick needles, typically used for rapid fluid administration or blood transfusions, not suitable for the delicate dermal layer. (c) 24 – 26 Gauge – This is the correct answer. These fine needles are ideal for intradermal injections, ensuring minimal pain and precise placement of the medication. (d) 20 – 22 Gauge – Commonly used for intramuscular or subcutaneous injections. They are thicker than needed for intradermal injections and can lead to improper drug delivery.