If I have a few drinks tonight can I still pass a alcohol urine on Monday? I don't know if the probation departments just check the level of alcohol in urine,( can detect alcohol up to 24 hours) or if they do a more extensive test that can detect alcohol for up to five days. Has anyone heard or know anything about it? I'd love to have a drink with my husband tonight... does anyone know anything that might help me at all? I was charged with prescription fraud, I know they test me for everything... including alcohol but I was hoping I could still have a drink occasionally. I can't asked my probation officer how extensive of a alcohol urine is done.. but if anyone knows anything at all... I'd appreciate some in put.