A prescription requires administering 2 teaspoons of medication. What is the correct metric equivalent?

A. 10 mL syringe: A 10 mL syringe is too large for a 1.5 mL intramuscular injection. Using a larger syringe reduces measurement accuracy and increases the risk of dosing errors.

B. 3 mL syringe: A 3 mL syringe is ideal for intramuscular injections ranging from 1 to 3 mL. It provides accurate measurement, allows safe administration, and is standard practice for most IM medications.

C. 1 mL syringe: A 1 mL syringe is too small for a 1.5 mL dose. Using it would require multiple injections, increasing patient discomfort and error risk.

D. 5 mL syringe: While a 5 mL syringe can hold the volume, it is larger than necessary. Using a smaller syringe like a 3 mL provides better accuracy and control for the 1.5 mL dose.

A. Subcutaneous: The subcutaneous route involves injection into the fatty tissue beneath the skin. Absorption is slower compared with intramuscular or intravenous routes because of limited blood flow in adipose tissue, making it unsuitable for rapid onset of medication effect.

B. Intradermal: Intradermal injections are administered into the dermis layer of the skin, primarily for diagnostic purposes such as allergy testing or tuberculosis screening. Absorption is very slow due to minimal vascularization, so it does not provide rapid systemic effects.

C. Intramuscular: Intramuscular injections deliver medication into muscle tissue, which has better blood supply than subcutaneous tissue. Absorption is faster than subcutaneous or intradermal routes but slower than intravenous administration.

D. Intravenous: Intravenous administration delivers medication directly into the bloodstream, providing immediate systemic availability. This route ensures the fastest absorption and onset of action, making it ideal for emergencies or when rapid therapeutic effect is needed.