Generally, drinking is discouraged when on medication like Prozac but I am aware some of my colleagues would argue that as long as you have a regular diet and no history of alcohol abuse, then one/two drinks are fine. But I'm a medical purist so I always advise against this.
With Prozac, when mixed with alcohol, it can sometimes add to the effects of the drug and cause a loss of judgment and motor skills and reflexes, dizziness and nausea may also show up in heavy amounts, as these are the two biggest side effects of Prozac on its own.
But it influences people differently so I would strongly suggest talking to your GP before drinking again.