Cocaine users can find themselves taking the drug multiple times in one session — this is known as a cocaine binge. The half-life of cocaine is two to four hours, so the greatest danger of overdose comes from topping up your dose during this time period. You can reduce the severity of the crash you will get afterwards by not repeatedly dosing in the same session. For the best chance at a painless recovery, and to reduce the risk of cocaine addiction, let the drug wear off, get some rest and don't use again the next day.