Everyone is different. I am on Methadone 25 mgs. And psych meds ie. Trasadone, Serequell. I also smoke. I weigh 210lbs. I am not a big exersizer. It might take me 5 to 7 days to get coke out of my system? You can always buy a first check drug screen at Duane Reade, Walgreen's. Plus i use cocaine once every 2 weeks, and under a half a gram. Honestly, through my experience, it is the amount used that makes the difference. Cocaine is water solluable, fluids, exersize, and the average person would get the dirty out in 3 to 5 days. Most answers will in fact tell you that. However, 5 to 7 days is the norm, and maybe 10 days if your urine is sent to the lab. I know people want to hear 3, 4 days tops. This isn't about what you want to hear though, it is about the facts!