This is a good question to ask of your doctor. I think in general, there is the suggestion to not drink while using antidepressants including Prozac because the effects of the alcohol will be more pronounced.
But here is an article which discusses this warning but also talks about drinking in "moderation" and then goes on to define what that means.
Give your doctor a call...I am sure this question gets asked a lot.
Hope this helps some. Thank you for your question.