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I take 2 mg klonopin before bed each night. how long will it show up in a urine test?

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suzanne66 12 Mar 2012

Klonopin (clonazepam) is in a group of drugs called benzodiazepines. It is short to intermediate acting benzodiazepine.
Benzodiazapines (eg Klonopin)are notorious for staying in your urine for weeks and sometimes months.

The half-life of Klonopin/Clonazepam is around 35 hours (varies with physiology/metabolic rate etc)... which means that the amount of Klonopin in your sytem will divide in half every 35 hours, assuming you don't take more. Example: 1mg after 35 hours equals 0.5mg still in your system, after another 35 hours 0.25mg still in your system, etc.

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