Indeed, you can say, 1. I was on an IV drip. 2. They put an IV on me. 3. I was receiving IV fluids. 4. I was put on IV fluids. 5. I had to be hydrated through an IV (if you were just given normal saline). if you were given meds, like antibiotics, vitamins, etc, then, I had to be given meds through an IV. 6. I was hooked up to an IV. Or as a child once said, 7. My veins are drinking medicine. :D I'm sure many other ways to express this idea, but these are the ones that come to mind right now.