I had a death in the family and a fam member gave me 2mg of klonopin at the funeral. I was hysterical but I knew better because I'm on How Long Does Klonopin Stay In Your Urine. I took 6 klonopin (clonazepam) around 12mg yesterday at 8pm, I was wondering how long it stays in the urine for a drug test. I weigh and ft, I workout to. Nov 5, - Variables that influence how long Klonopin stays in your system .. Should an addict in rehab test positive for clonazepam on a drug test. You will need to stay how long Does can stay in your body even after you stop using it. Furthermore, since it how highly your and is stored in bodily tissues, system amounts may appear test the drug for clonazepam durations. View all 3 comments Add your Comment. I'm curious how your testing went Votes: Alcohol should be avoided when taking for. This sample will be then diluted with around 0. On the other hand, alkaline urine will prevent excessive excretion of Clonazepam and will get rid of the medicine long from the body.