Best guess...
Was holding water and went to go see a REAL MD (probably against Palumbo's advice).
Kidney function was probably off, MD probably told him that if he competed with Diuretics he might go into renal failure. Also Palumbo is known to kill kidneys on diuretics, probably almost as bad as Milos.
He probably weighed his options, and decided that free Species products and a plastic trophy are not worth it.