Had 1 12oz bottle of alcohol (5.9%) forgot was supposed to continue my pain medication. codeine#3. when can i take that after having alcohol?

Right now if...: Both codeine and alcohol can make you drowsy, dizzy, lightheaded, spacey etc. so it is advised to avoid combining them as they will have an additive effect. But one beer should not affect you that much. As long as you are not driving, operating heavy machinery or performing surgery tonight it should be safe to take you pain med now if needed.See https://www.drugs.com/food-interactions/codeine.html