Tegretol and joint pain

for a number of years i had been taking tegretol for depression, my dr. then switched me to trileptal suggesting it was a purer form of the same drug, i've been on trileptol for over 3 years now, my face is a mess rash, itching alot of the time , i have never ever had any such problem before, also i am experiencing musle and joint pain, another big one is my hair is thinning loss of condition, my question is can long term rx use be causing too many toxins in my system?

Have been on tegretol for about 12 years now for grand mal seizures... I started when I was 12 years old. Main side effect has been memory loss- Can't remember much short term.. Also have bad joint pain in the knees and elbows since I was 16. Have had good success with the med stopping seizures, but don't really like the side effects.. Recently, have had bad dizziness and lightheaded feeling after almost having a seizure a few days ago .... Mostly ok with tegretol thou..