I spoke to nurse at my surgeons office and she said no one can get 64oz and 60mg protein at first, you have to work up to that. Most important is water to stay hydrated, I couldn't even tolerate water for a few days, I was able to get sips of lemon Powerade down. That was dec 6th and today I am 2 weeks post op and doing much better with liquids but can't keep Protein shakes down, I am nauseated thinking about it. Good luck to you.