What Is an Intramuscular Injection?
An intramuscular injection is an injection which introduces medication directly into a muscle. From the muscle, the medication will travel to the rest of the body via the cardiovascular system. This method of medication delivery may be used for medications which cannot be given orally for various reasons or when rapid action is desired. Some examples of medications which can be delivered intramuscularly include: vaccines, antibiotics, steroids, pain management medications, and sex hormones.