My Doctor Has Prescribed Me Revia. I Have Not Used

my doctor has prescribed me revia. i have not used opiates in over 6 months. when i went off opiates i did it cold turkey. I went through hell doing it but after a week i felt a lot better. i was a heavy user 1000-1500 mg per day up my nose. i started using Special K 2 months ago and this is what they have prescribed to me t stop using it. I am very confused.

they also wrote me a scrapt for