IV fluids, or intravenous fluids, are liquids administered directly into a vein to deliver medications, replace fluids lost due to dehydration, or provide nutrition. There are several types of IV fluids, including saline solutions, dextrose solutions, and lactated Ringer's solution. Each type serves a different purpose and is chosen based on the patient's specific needs. While generally safe, IV fluids can pose risks such as infection, fluid overload, and allergic reactions.