High Calcuim Levels

My brother is on Tarceva and has lost alot of weight and is always so sick, but thankfully the onc doc is going to give him a break so he won't be sick for the holidays. He's my younger bro and has absolutely no strenth, very tired and I just noticed looks old and his color is horrible. So with any luck he will be able to build himself back up again. Anyway we recently went to the onc doc. He is having real trouble with his calcium levels and it is causing him alot of problems. Has anyone heard of this?