Hi Essbee.
Fluoextine is the same as Prozac. 20 mg is a fairly low dose (think it is the usual dose for depression). Apart from the depressant qualities of alcohol, you should be fine having a drink with them, but alcohol and any AD can be a strange combination - make you drink etc, so take it very carefully.
I've had them two times, very successfully. Time 1 - bit agitated for a few days - Time 2 - mildy upset stomach for a couple of weeks on and off - NOTHING REMOTELY INCAPACITATING OR THAT WOULD HAVE MADE ME NEED TIME OFF WORK/NORMAL ACTIVITIES.
No side effects. I'ld say they take a couple of weeks to start to have any effect, and a couple of months to really kick in and have a big improvement - I was more "complex" than you, in that my problem was OCD as well as Depression - so you might find that they work a bit quicker for you. And you've seen me drink erm a fair amount whilst on Prozac without any dodgy results