I drank a little bit alcohol, can i take a xanax (alprazolam)?

No: The combination of benzodiazepines and alcohol is very risky and can result in CNS depression, including respiratory depression, coma and death in sensitive people. I don't know what you mean by a "little, " but my experience with people who say that is that they mean a lot more than that. Does your doctor know that you are drinking on your mediation? If not, he/she needs to know about it.Be honest.