intravenous

Imagine someone feeling very sick and needing medicine quickly. Sometimes doctors do not use pills at all. Instead, they give fluids or medicine directly into a person's vein through an IV line. That is what intravenous means: going into a vein.

Think of it like taking a direct route instead of a longer road. When something is given this way, it enters the bloodstream without going through the stomach first. You might hear phrases like "IV drip," "IV fluids," or "intravenous antibiotics." It is most common in hospitals and other medical settings.

The term intravenous describes something that is put into a vein, usually so that fluids, medicine, or nutrients can enter the bloodstream directly. The word comes from Latin: intra means "within," and vena means "vein." In everyday English, the word is mostly used in medical contexts.

In medicine, this method is important because it can work quickly and allows careful control over what the patient receives. A doctor might order an intravenous infusion of fluids for dehydration, give antibiotics intravenously to treat a serious infection, or deliver pain medicine, blood, or anesthesia through an IV. You will often see this shortened to "IV."

You will usually see intravenous before nouns such as injection, line, drip, infusion, fluids, or therapy. It can also appear as an adverb in the form intravenously, as in "The drug was given intravenously."

Although people sometimes mention IV vitamin drips in wellness settings, the core meaning stays the same: something is being given directly into a vein. So when you hear intravenous, think of a medical treatment that enters the body through a vein rather than by mouth or by a shot into muscle.