Thursday, October 30, 2014
Introducing Mood 24/7, a new tool that helps you track your mood from day to day using your mobile phone. Try it today!

Friday, November 28, 2008 david, Community Member, asks

Q: how long does klonopin stay in your urine or system after stop taking?

Answer This
Answers (2)
11/30/08 11:13am

David - I'm not sure what you are really trying to find out. If you are concerned about passing a urine screen it will depend on the sensitivity of the test used and you are not likely to find anyone who will volunteer that info. Klonopin has a half-life of up to 50 hours. That means that half of the active metabolite is still in the system after 50 hours, half of that half is still present after 100 hours and so on.


Rick Wirtz


Rick Wirtz is a Psychologist, not a Psychiatrist. Although the majority of Psychologists are not authorized to prescribe medications or give you specific advice about them, they typically have experience working with patients who take a variety of medications. The response above is not intended to diagnose or treat any medical or mental disorder. Any information given in a post about medication is for educational purposes only and primarily to aid you in having an informed discussion with your own physician.

thope76, Community Member
1/12/10 1:11am

I was wondering the same thing.  I'm not taking a drug test or anything.  I only take .25mg a day and also only have 10 pills prescribed to me to help alleviate my SSRI side effects.  When I stop taking klonopin, I was just wondering how long it would take to get out of my system because I want to celebrate my birthday (and getting off those meds) with some cocktails and I don't want to mix.




changeme, Community Member
8/12/10 4:15pm

No I'm perscribed Klonopin and for some reason my Dr. ran a drug screen with blood and none showed up. I have depression and use them to go to sleep at nite and that's all. Some nites I don't have to take anything. So I was wondering how long would it take to get out of your system for it not to show in a blood screen. I am on Medicaid so that might have somthing to do with it. I have taken these for years. I also go to the restroom about evey hour and a half, I have a kidney disease and an over active bladder along with other medical problems.


P366Y, Community Member
7/16/11 4:01pm

I have been taking Clonazepam for almost 7 years. I started by abusing it (unforunetaly). I have had MANY drug screens throughout the past 10 years and I have found the time Clonopin stays in a persons system varies GREATLY! It showed up in my urine for 4 weeks straight and I hadnt taken ANY in that 4 weeks, but I had taken it previous to that. I started using Clonazepam correctly about 6 1/2 years ago and I am SEVERLY hooked on the stuff! So I dont recommend it to ANYONE although I do KNOW that it DOES WORK for anxiety, depression, etc., My doctor is actually tapering me off it right now. The bad part is 1) I didnt ask for it. 2) Within the last 3 weeks I have gone from 3mgs/day to 1mg/day with Phenobarbitol at night which I am scared to take because it is yet just another addictive substance. I will never win! It all depends on how much you take, how often you take it, your weight, metabolism and the amount of water you can possibly drink without overdosing from that...So its a very hard question to answer and the only reason I am writing an answer is because I was wondering the same thing and thought I would share my experience(s). :) Good luck.... 

Answer This

We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.

By david, Community Member— Last Modified: 04/03/14, First Published: 11/28/08