Intramuscular injections are a common practice in modern medicine. They are used to deliver drugs and vaccines. Several drugs and almost all injectable vaccines are delivered this way.
Intramuscular injections are used when other types of delivery methods aren’t recommended. These include:
• oral (swallowed into the stomach)
• intravenous (injected into the vein)
• subcutaneous (injected into the fatty tissue just under the layer of skin)
Intramuscular injections may be used instead of intravenous injections because some drugs are irritating to veins, or because a suitable vein can’t be located. It may be used instead of oral delivery because some drugs are destroyed by the digestive system when a drug is swallowed.
Intramuscular injections are absorbed faster than subcutaneous injections. This is because muscle tissue has a greater blood supply than the tissue just under the skin. Muscle tissue can also hold a larger volume of medication than subcutaneous tissue. Intramuscular injection, often abbreviated IM, is the injection of a substance into a muscle. An intramuscular injection is a technique used to deliver a medication deep into the muscles. This allows the medication to be absorbed into the bloodstream quickly. You may have received an intramuscular injection at a doctor’s office the last time you got a vaccine, like the flu shot.
Intramuscular injections are often given in the following areas:
1. Deltoid muscle of the arm. The deltoid muscle is the site most typically used for vaccines. …
2. Vastus lateralis muscle of the thigh. …
3. Ventrogluteal muscle of the hip. …
4. Dorsogluteal muscles of the buttocks.