Hello, I was a tobacco chewer. I got white and red patched with hard line on right buccal mucosa and red lesion on left buccal mucosa. I have quitted the habit from 2 yrs back...and had taken lycopen and multivitamins. 2 months back my doc suggest to do biopsy...and report was leukoplakia on right and consistent with erythroplakia on left. Doctor prescribed RET 10(all trans retionic acid) tablet to take twice daily and follow up after 3 months. I am not getting any changes ..kindly help me...will i need to change my doctor?