i have been on the normal 50mg for over 9 months.. and was taking 3 a day.. now i been getting the sweats bad.. through out the day.. i can not take them after 2pm due to they keep me awake at night time.. so they put me on slow release though two a day.. i was on them for 5 days with major nightmares so bad that i was afraid to sleep.. so i stopped taking them .. went back on 50 mg.. 3 a day.. and no night mares.. i have googled this and apparently its very unusual.. anyone else had this problem.. i am afraid to tell my doctor in case he wont believe me. i felt like it took him a while to believe i actually had a problem in the first place. over nine months ago.. then i had mri etc etc so obviously i needed something to get rid of the pain.