hi, i take levoxyl, and was just upped to 50mgs. i am thirsty all the time, i have joint pain and was diagnosed with RA. my fingers are dried out and look like a 400 year old mummy. i've been on it for about a year now. my son is on it too but takes 25mgs. with no problems. he lost about 22 pounds the first two months. will he ever be able to come off this med, hes been on for about 2 years.