How Long Does Clonazepam Stay in Your System?

June 1, 2022
How Long Does Clonazepam Stay in Your System?
How Long Does Clonazepam Stay in Your System?

Clonazepam is a drug from the category of benzodiazepines. It is used to treat anxiety, panic attacks, and control and prevent seizures due to its ability to calm your nerves and brain.

The most common brand names for this drug are Klonopin and Klonopin Wafer. Clonazepam is usually prescribed as 0.5 mg, 1 mg, and 2 mg oral tablets. The prescription determines how long clonazepam stays in your system.

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Other Clonazepam Uses

Besides treating anxiety, panic attacks and seizures, Clonazepam can be used to treat:

  • Epilepsy
  • Involuntary muscle spasms
  • Restless leg syndrome

Most doctors will advise you to use the medication for only 2 to 4 weeks to avoid getting dependent on the drug.
If you use Clonazepam for longer than four weeks, your doctor will gradually reduce your dose. Doing so will ensure you avoid or minimize withdrawal symptoms. Alcohol is prohibited when you are taking this medication.

How Long Will You Sleep With Clonazepam?

One of the most common side effects of Clonazepam is sleep disturbances. When the drug affects your brain neurotransmitters, your sleeping patterns will be affected, and you might find yourself having sleep problems (lack of sleep or too much sleep) for most nights. The effects range from one person to another. Patients’ sleep patterns will be affected, and you will find yourself sleeping deeply for over 10 hours. In such cases, you will also have trouble waking up, and you will be likely to experience drowsiness. You should avoid operating heavy machinery when you are on Clonazepam and report to your doctor if you experience any change in your sleeping patterns.

Side effects of Clonazepam

How Long Does Clonazepam Effects Last?

Like every other drug, Clonazepam has side effects. These side effects differ from one person to another and from kids to adults.
The effects of most benzos such as Xanax can last for about 5 hours. However, Clonazepam is much stronger and its effects can last up to 12 hours. If the effects last more than 12 hours, you should consult your doctor.

What Drug Can Replace Klonopin?

When you get adverse side effects from using Clonazepam, your doctor might opt to replace your medication. Xanax is one of the main drugs that doctors can prescribe in place of Klonopin.

Are you concerned about some symptoms? Ask for professional help today!


Xanax is a drug from the benzodiazepine class that changes the activity of brain neurotransmitters. Xanax is used to treat anxiety and panic attacks, just like Klonopin. Unless you were prescribed Klonopin to treat and control seizures, then Xanax is a perfect replacement. However, your doctor cannot replace Klonopin with Xanax if you are pregnant, planning to get pregnant, or breastfeeding. Xanax is harmful to unborn babies since they can be born with severe withdrawal symptoms that can be fatal if not well treated. Xanax has side effects such as racing thoughts, agitation, poor coordination, and tiredness.

How Long Does Clonazepam Stay in Your System?

Doctors have found that Klonopin builds up in your body over time as you use it, and it can take between 20 to 50 hours for it to leave your body. The most common factors affecting the time in which Klonopin or Clonazepam stays in your system are:

  • Dosage
  • Age
  • How frequently you use the medicine
  • Period of usage
  • Weight
  • Metabolism
  • Genetics

Klonopin is one of the hardest drugs to screen for as there are over 50 kinds of benzodiazepines in the medical field. Every one of these drugs appears differently in a test.

Doctors carry out four main tests when testing for Klonopin. They are disclosed below.

Hair Tests

Traces of Klonopin can be detected in your hair three weeks to one month after your last dose. However, hair tests are not as reliable as other tests, and they can sometimes show a false positive or a false negative.

Blood Tests

Klonopin metabolizes faster; therefore, evidence of it can be detected seven days after your last dose. When Klonopin is broken down to 7AC (7 aminoclonazepam), its traces can last for just 92 hours.

Urine Tests

Traces of Klonopin can be found in your urine 21 to 28 days after your last dose. Most doctors have reported that urine tests are more reliable than other tests.

Lab tests for Klonopin

Saliva Tests

Klonopin residues can be seen in your saliva 5 to 6 days after your final dose. However, saliva tests in Klonopin are not reliable since they are prone to showing false positives. Your doctor is more likely to do a 7AC test for more reliable results.

Final Words

Different prescriptions react differently to various people. If you have any doubts about the medicine prescribed to you, you need to consult your doctor. At Mango Clinic, your mental health is a priority. Contact us today to set an appointment with our licensed and professional doctors.


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