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Intravenous (IV) refers to anything that occurs within or enters by way of a vein. This can include the administration of fluids, such as medications, blood, or nutrients, directly into a vein. An intravenous injection is a medical procedure where a substance is delivered directly into the bloodstream through a vein. The term "IV" is also used to refer to the apparatus used for this purpose or the fluid being administered. This method ensures that substances enter the body quickly and directly into circulation.12

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