Max dose of Versed?

Had a patient last night who came from another ICU on Fentanyl 200mcg/hr and Versed 60mg/hr and was STILL awake. He was a young guy, drinks a lot according to his family, about a 1/5 of vodka per day. Had to chase around the residents because Versed doesn't really do much for someone who is in withdrawls and we can't put the guy on the CIWA protocol because he's intubated. Took me three hours to get Morphine/Ativan gtts ordered for this patient and let me tell you they worked TONS better than Fent/Versed. I ended up talking to the Senior resident and I told him, I wasn't comfortable with the patient being on 60mg/hr of Versed and neither was he. But I'm looking all through my books and online and can't find the max dose of Versed.