What is the maximum volume for IM injections in adults and large children?

The maximum volume for intramuscular (IM) injections in adults and large children is typically dictated by the site of administration. For the deltoid muscle, the maximum volume is indeed limited to 2 mL due to the muscle's size and the risk of discomfort or injury with larger volumes. For the lateral thigh, which is a larger muscle group, it can accommodate up to 4 mL, making it suitable for administering larger volumes without the same concerns associated with deltoid injections.

This understanding is crucial in clinical practice to ensure that medications are administered safely and effectively, minimizing the risk of complications such as pain, muscle damage, or suboptimal absorption of the medication. By adhering to these volume guidelines, healthcare providers ensure that patients receive appropriate dosages while maintaining their comfort and safety during the injection process.