1. by injection directly into a muscle
Usage: medical/pharmaceutical context; often abbreviated as IM

Examples

• The vaccine was administered intramuscularly in the upper arm.
• The doctor injected the medication intramuscularly to ensure faster absorption.
• Patients received the antibiotic intramuscularly twice daily for one week.
• The hormone is given intramuscularly rather than by mouth for better effectiveness.
• The nurse prepared the syringe to deliver the drug intramuscularly.