The deltoid muscle is more vascular than the gluteus muscle,so it is possible to inject a large volume (exceeding 1 mL)of drug into the deltoid muscle.

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The deltoid muscle is smaller and typically accommodates up to 1 mL of medication for an intramuscular injection, whereas the gluteus muscle, being larger, can accommodate larger volumes, often up to 2.5 mL or more, depending on the individual's muscle mass.

The Deltoid Muscle Is More Vascular Than the Gluteus Muscle,so