How Long Does Klonopin Stay In Your System?

Klonopin, also known as clonazepam, is a long-acting benzodiazepine prescribed for anxiety, panic disorders, and seizures. Understanding how long Klonopin stays in your system is important whether you’re concerned about drug testing, planning to stop the medication, or managing your treatment safely. As a long-acting benzodiazepine, Klonopin remains in the body significantly longer than short-acting benzos like Xanax or Ativan.

The length of time Klonopin stays detectable depends on several factors, including how long you’ve been taking it, your dosage, and your individual body chemistry. Typically, drug detection times vary depending on the type of drug test used, with some tests able to detect Klonopin for days while others can find traces for weeks or even months after your last dose.

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.

Read more about how long Klonopin can be detected in urine

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.

Read more about how long Klonopin can be detected in blood

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.

Read more about how long Klonopin can be detected in hair

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.

Why Klonopin Detection Times Matter

Knowing about Klonopin detection times is important for several reasons beyond just passing a drug test. If you’re switching medications or starting a new treatment, your doctor needs to know how long Klonopin will remain active in your system to avoid dangerous drug interactions. Employers in safety-sensitive industries may require drug screening, and knowing your timeline helps you plan accordingly and communicate honestly with testing administrators.

Detection times also matter when tapering off Klonopin or entering a detox program. Because Klonopin stays in your system for so long, withdrawal symptoms may not appear immediately after your last dose, sometimes taking several days to emerge. This delayed onset can catch people off guard if they’re not prepared.

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

Browse our directory or reach out to the Substance Abuse and Mental Health Services Administration (SAMHSA) for more information about addiction recovery.

Written by the Addiction Resource Editorial Staff