Which route delivers injections into the muscle, such as in the upper arm or thigh?

Which route delivers injections into the muscle, such as in the upper arm or thigh?

• A. Intramuscular
• B. Intradermal
• C. Subcutaneous
• D. Rectal

Answer: (A)

Intramuscular administration delivers meds into muscle tissue. This route targets the muscle itself, with good blood flow allowing quicker absorption into the bloodstream. Common sites include the deltoid in the upper arm and the vastus lateralis in the thigh, which are convenient and can accommodate the typical volumes used for many vaccines and other injections. Intradermal injections go into the skin's dermal layer and are used for tests like TB screening, involving very small volumes. Subcutaneous injections go into the fatty tissue just under the skin, with slower absorption, and are used for medications like insulin or anticoagulants. Rectal administration is not an injection into muscle; it refers to delivering medicines via the rectum (for suppositories or enemas).

Intramuscular administration delivers meds into muscle tissue. This route targets the muscle itself, with good blood flow allowing quicker absorption into the bloodstream. Common sites include the deltoid in the upper arm and the vastus lateralis in the thigh, which are convenient and can accommodate the typical volumes used for many vaccines and other injections.

Intradermal injections go into the skin's dermal layer and are used for tests like TB screening, involving very small volumes. Subcutaneous injections go into the fatty tissue just under the skin, with slower absorption, and are used for medications like insulin or anticoagulants. Rectal administration is not an injection into muscle; it refers to delivering medicines via the rectum (for suppositories or enemas).