What is the correct way to administer an intramuscular injection?

Administering an intramuscular injection requires inserting the needle straight into the muscle to ensure that the medication is delivered effectively into the deeper tissue, where it can be absorbed properly. Inserting the needle at a 90-degree angle optimizes this process by allowing the needle to penetrate the muscle adequately.

This angle ensures that the medication is administered directly into the muscle tissue rather than under the skin or in a less effective location, which could impair absorption and delivery. Using this method minimizes discomfort for the patient and prevents potential damage to surrounding tissues.

Other options describe methods that do not align with the standards for intramuscular injections. For instance, inserting the needle at a 45-degree angle may be suitable for subcutaneous injections but not for intramuscular ones. In addition, trying to insert the needle parallel to the skin would not engage the muscle tissue effectively, and administering an injection without a needle is not a valid or practical method. Using the correct technique is essential for ensuring both the efficacy of the medication and the safety of the patient.