What gauge range is typically used for IM injections?

The gauge range typically used for intramuscular (IM) injections is 22-25 gauge. This range is considered optimal because it allows for the injection of medication into the muscle tissue while minimizing discomfort for the patient. Using a gauge that is too large, such as in the 18-20 gauge range, can cause unnecessary pain and tissue trauma, while gauges that are too small may not adequately deliver thicker medications, leading to complications such as incomplete administration.

In practice, the selection of gauge also depends on factors like the viscosity of the medication and the muscle mass of the patient. For most IM injections, particularly in adult populations and for standard medications, a 22-25 gauge needle provides a good balance between ease of injection and patient comfort. This gauge range is suitable for delivering vaccines and other medications efficiently into the muscle.