I`ve been on Citalopram for almost 1 year. In the early stages of...

I`ve been on Citalopram for almost 1 year. In the early stages of taking this medication, I felt great. I was taking 20mg. After about 3 months I increased my dose to 40mg, as I felt anxious and didn`t feel that I could cope with day to day moments. I stayed on 40mg for approx 3 months, and increased my dose to 60mg. Since then I have found that I feel invincible to do what I want. The feeling I never had before. I found that I craved for Alcohol so much, that I drink till there is no more left to drink, as I don`t feel the effects of Alcohol.Is this normal to feel this way? Does anybody feel that they have this problem too. HELP!!