Klonopin, also known as clonazepam, is a long-acting benzodiazepine drug that can remain in urine for up to 30 days. This is longer than short-acting benzos like Xanax.
Klonopin can be detected in:
- urine: 21 to 30 days
- blood: more than three days
- saliva: up to six days
- hair: up to 90 days
If you take Klonopin regularly, the timeline for how long the drug stays in your system can vary.
How Long Does Klonopin Show Up In Urine Tests?
Urine screenings are the most commonly used drug testing method. Depending on a variety of factors, Klonopin may remain detectable in the urine for anywhere from three to 30 days.
People who have been taking Klonopin regularly for a long time will have traces remain detectable in their body for longer, and will need to taper their dosage gradually to get off it.
How Long Does Klonopin Show Up In Blood Tests?
Klonopin has a half-life of 30 to 40 hours. It takes about two half-lives for Klonopin to leave the blood.
This means that Klonopin, on average, can remain in a person’s blood for three or more days after their last dose.
How Long Does Klonopin Show Up In Saliva Tests?
Klonopin can be detected in oral fluids like saliva for five to six days.
Saliva tests are commonly used following motor vehicle accidents and other emergency situations. These tests can detect the use of drugs like Klonopin very quickly after use.
How Long Does Klonopin Show Up In Hair Tests?
Hair testing methods can detect the use of drugs for the longest amount of time. Like most other drugs, Klonopin will stay in hair for at least 90 days.
As a long-acting drug that is known to be habit-forming, Klonopin may stay in hair for longer.
Severe drug dependence can cause drugs to stay in hair for months or even years after a person’s last dose.
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Factors That Can Affect Klonopin Detection Times
If you or a loved one takes Klonopin, the actual timeline for how long it will stay in your system can vary. Average estimates don’t apply to everyone.
Factors that can influence Klonopin detection times include:
- Dose: Higher doses of Klonopin may take longer for the body to metabolize and eliminate from the system.
- Frequency of use: Taking Klonopin regularly can lead to increased tolerance and drug dependence—both of which can lead to a longer detection window than average.
- Polydrug use: Taking other drugs with Klonopin, including alcohol, can affect how long it takes for the body to metabolize the drug.
- Body composition: People with a higher body fat percentage will absorb and metabolize drugs more slowly. This can lengthen the detection time.
- Liver and kidney function: Due to their role in drug metabolism, having impaired liver or kidney function may cause drugs to remain in the system for a longer period.
- Metabolic rate: Having a slow metabolism will cause drugs to stay in the system for longer, due to the increased time it takes for them to be fully processed.
How To Get Klonopin Out Of Your System
Getting off Klonopin takes time. This is the only way to get it out of your system.
If you’ve been taking Klonopin for a long time, or struggle with drug abuse, do not stop taking Klonopin all at once.
Regular use of Klonopin can lead to physical dependence. Physical dependence on Klonopin can trigger withdrawal symptoms, including seizures, if you try to stop taking it all at once.
Whether you have been taking Klonopin as prescribed by a doctor, or whether you’ve been misusing it, the safest way to get off Klonopin is to begin a detox program.
Find Treatment For Klonopin Dependence And Addiction
Getting off Klonopin is possible. If you’ve been abusing Klonopin, a drug treatment program may be recommended to help you stay off Klonopin and find supportive alternatives.
Treatment programs for Klonopin abuse and dependence may offer:
- treatment for withdrawal symptoms
- individual counseling
- group counseling
- behavioral therapy (e.g. Cognitive Behavioral Therapy)
- mental health treatment
If you or a loved one needs help getting off Klonopin, we can help. Call our helpline today to find a Klonopin detox treatment program that’s right for you.
Addiction Resource aims to provide only the most current, accurate information in regards to addiction and addiction treatment, which means we only reference the most credible sources available.
These include peer-reviewed journals, government entities and academic institutions, and leaders in addiction healthcare and advocacy. Learn more about how we safeguard our content by viewing our editorial policy.
- American Family Physician—Urine Drug Tests: Ordering and Interpreting Results
- U.S. Food and Drug Administration (FDA)—Klonopin Tablets (Clonazepam)
- U.S. National Institute on Drug Abuse—Benzodiazepines and Opioids
- U.S. National Library of Medicine: PubMed—Detection of Diazepam, Clonazepam, and Alprazolam in Oral Fluid Collected From Patients Admitted to Detoxification, After High and Repeated Drug Intake