Chevy has had multiple skin issues over the years and this time they diagnosed mange back in Nov. The vet gave her : Prednisone 20mg, 1 every 12 hours Cephalexin Caps 250mg, 1 every 12 hours Cephalexin Caps 500mg, 1 every 12 hours Chlorhexidine PS Micro Spray, Between baths Chlorhexidine PS Shampoo Since she has taken these, she has stopped the excessive scratching/licking, but has been drinking excessive amounts of water. The vet told my dad that this would happen. She also has a sorta "brightness" in her eyes, like a person high on something would have. Should I be worried about her kidneys? I read somewhere that excessive drinking/urination is caused by kidney problems. I'm wondering if the medication could have done something to her kidneys. She is also 10+ (not sure her actual age, but she is up there.) Has anyone had their dogs on these?