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Well, here's the no BS actual breakdown for alcohol. If you drink and your blood up to 12 hours, your liver process is roughly one standard drink per hour. So if you have 12 drinks, it takes 12 hours. If you have 20 drinks, I don't know. Maybe you're dead. In your urine, 6 to 24 hours. You could actually get a certain urine test. The standard test is 6 to 24 hours. A ETG or ETS test will take up to 70 to 80 hours, three to four days. Breathalyzer, only 12 to 24 hours. Hair, up to 90 days. There you go.