11 days: The half-life of Klonopin (clonazepam) is as high as 50 hours. It should be out of your system in 11 days.
Answered 3/15/2017
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About a day: Klonopin's clinical effects last about twelve hours, so it most likely is gone after about thirty six hours from your blood stream. If you are inquiring about this for drug tests, keep in mind that this is general information from my practice, and may not be correct for you or your situation.
Answered 10/27/2018
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