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Hello from JustAnswer.
It is not clear what question you are asking.
What information are you seeking?
It depends upon what you mean by wearing off. The high from snorting cocaine will typically last from 15 - 30 minutes. There is a lesser effect that can last for 60 - 90 minutes.
The half-life of cocaine is about one hour, so it will take 4-6 hours for the drug to essentially be out of the blood stream.
You posted anther question saying that you have not slept in a few days. The cocaine would not last a few days in your system. However, it is possible that someone that is addicted to any drug may have symptoms for several days when the preferred drug is not being taken. That is not an issue with how long the cocaine will take to wear off - it is an issue with craving the drug.