An intramuscular injection (IM) delivers medication directly into a muscle for rapid absorption into the bloodstream. It's commonly used for vaccines, antibiotics, and hormones. Administered by healthcare professionals, IM injections are vital for efficient treatment in hospitals, clinics, and home healthcare services.

An intravenous injection (IV) introduces medication or fluids directly into a vein for rapid absorption into the bloodstream. This method is crucial for delivering medications, fluids, and nutrients quickly and efficiently. Administered by healthcare professionals, IV injections are essential in hospitals, clinics, and emergency medical situations.

A subcutaneous injection (SC) delivers medication into the tissue layer between the skin and muscle for slow and steady absorption into the bloodstream. Commonly used for insulin, hormones, and certain medications, SC injections are administered by healthcare professionals and are vital for managing various medical conditions effectively.

A drip, also known as an intravenous (IV) infusion, involves delivering fluids, medications, or nutrients directly into a vein using a sterile tube and a drip chamber. This method ensures rapid delivery into the bloodstream, making it essential for hydration, medication administration, and nutritional support in medical settings.