What will alprazolam show up as on a drug test?

Depends on a lot of factors. If you took just a single dose (and haven't been using it before), and that dose was an average dose (doses range from 0.5 to 2mg, assume 1mg is average), than it should be out of yoru system (urine test wise) in 3 days. However I would give it 4-5 days to err on the side of caution and also because metabolism for each person is different. Now if you take it consistently, then levels have built up in your system. It would take 7+ days to clear.