What is an intramuscular (in-tra-MUS-q-lar) (IM) injection?
An intramuscular injection is a “shot” of medicine given into a muscle. A syringe (suh-RINJ) with medicine in it, is attached to a needle. The needle goes through the skin and into a muscle. The medicine is pushed into the muscle by pressing on the syringe plunger. When the medicine has been pushed into the muscle, the needle is removed.