What is the correct angle for intramuscular injections?

For intramuscular injections, the correct angle is 90 degrees. Administering the injection at this angle ensures that the medication is delivered directly into the muscle tissue rather than the subcutaneous layer. This is important because intramuscular injections are designed to allow for deeper absorption of medication, which is often necessary for larger volumes of drugs or those that need to be absorbed rapidly into the bloodstream.

Using the 90-degree angle means that the needle penetrates the skin and reaches the muscle without compromising the integrity of the surrounding tissues, which is a key factor in achieving effectiveness and minimizing patient discomfort. Alternative angles, such as those suggested in other options, do not provide the same level of assured delivery into the muscle, which could lead to improper administration or decreased efficacy of the medication.