IV is actually short for intravenous (say: in-truh-vee-nus). Did you know you can get nourishment, fluids, and medicine through your veins? In some cases, it can be the best way to deliver the fluid or medicine that a person needs. IVs might be used if a person is having surgery, is very sick, or can't eat and drink normally. Whatever the reason, an IV can help the person get better again.