I did my fourth Opdivo treatment a few days ago and was told after the treatment that my blood test was showing that my liver enzymes were elevated. I thought initially that it must obviously be a side effect however I'd like to rule out one other possibility. In order to make sure I was hydrated so that the nurse could more easily find a vein for my IV I drank a boat load of water the day before and the morning of my treatment. I don't usually drink that much water. Could the water have caused an increase in my liver enzymes?