How Long Does Klonopin last (Details on Dosage, and Effect)

How long does Klonopin last? Klonopin is a commonly prescribed benzodiazepine (benzo) that has relatively long-lasting effects. The effects of most benzos, such as Xanax or Valium, last between 3-4 hours, whereas the effects of Klonopin can last anywhere from 6-12 hours.

how long does klonopin last

What is Klonopin?

Klonopin is a prescription brand-name medication. It’s FDA-approved to treat the following conditions:

Certain seizure disorders in adults and children of all ages. A seizure disorder is a condition in which you have several seizures. Klonopin treats:

‣ atonic seizures

‣ myoclonic seizures

‣ some absence seizures (which used to be called petit mal seizures)

Panic disorder with or without agoraphobia in adults. Panic disorder is a type of mental health condition that causes repeated panic attacks. Agoraphobia is a fear of being in places from which it may be hard to leave.

How Long Does Klonopin Last? Drug Details

Klonopin contains the active drug clonazepam. Klonopin belongs to a class of drugs called benzodiazepines. Klonopin comes as oral tablets. They’re available in three strengths: 0.5 milligrams (mg), 1 mg, and 2 mg.

Is Klonopin a Controlled Substance?

Yes, Klonopin is a controlled substance. A controlled substance is a drug that’s regulated by the government because it can lead to misuse or addiction.

Klonopin contains the active drug clonazepam, which is classified as a Schedule IV (four) drug by the Food and Drug Administration (FDA). This means that the drug has accepted medical uses, but it has the risks mentioned above.

For more information, see the “Klonopin withdrawal and dependence” section below.


For information about the effectiveness of Klonopin, see the “Klonopin uses” section below.

Klonopin Generic

Klonopin is a brand-name drug that contains the active drug clonazepam. This active drug is also available as a generic medication. A generic drug is an exact copy of the active drug in a brand-name medication.

The generic is considered to be as safe and effective as the original drug. Generics tend to cost less than brand-name drugs.

If you’re interested in taking the generic form of Klonopin, talk with your doctor. They can tell you if it comes in forms and strengths that can be used for your condition.

Klonopin Dosage

The Klonopins dosage your doctor prescribes will depend on several factors. These include:

‣ Your age

‣ Weight (for children)

‣ The type and severity of the condition you’re taking Klonopin to treat

‣ Other medical conditions you may have

Typically, your doctor will start you on a low dosage. They may adjust it over time to reach the amount that’s right for you. They’ll ultimately prescribe the lowest dosage that provides the desired effect.

The following information describes dosages that are commonly used or recommended. However, be sure to take the dosage your doctor prescribes for you. Your doctor will determine the best dosage to fit your needs.

Drug Forms and Strengths

Klonopin comes as an oral tablet. They’re available in three strengths: 0.5 milligrams (mg), 1.0 mg, and 2.0 mg.

Be sure to take only the dosage of Klonopins that your doctor prescribes.

Dosage for Seizure Disorders

To treat certain seizure disorders in adults, you’ll likely take a 0.5-mg dose of Klonopins three times per day. If your seizures are not well managed after 3 days, your doctor may increase your dose by 0.5 mg to 1 mg.

They’ll continue adjusting your dose every 3 days or so until your seizures are well managed.

The maximum dosage (highest dose) of Klonopins for seizure disorders in adults is a total of 20 mg per day. The drug is divided into doses throughout the day. Be sure to follow your doctor’s instructions about how many hours between doses are safe for you.


Dosage for Panic Disorder

To treat panic disorder, you’ll likely take 0.25 mg of Klonopins two times per day. If your panic disorder is not well managed after 3 days, your doctor may increase your dosage to 0.5 mg two times per day. Most people find that their panic disorder is well managed with this dosage.

However, your doctor may continue to make dosage adjustments until they find what works for you. The maximum dosage of Klonopins for panic disorder is 4 mg per day.

Children’s Dosage

To treat seizures in children, the dosage of Klonopin depends on your child’s age and weight:

For children ages 11 to 17 years, the recommended dosage is the same as for adults. See “Dosage for seizure disorders” above.

For children ages 10 and younger or children who weigh 30 kilograms (about 66 pounds) or less, the dosage is based on their weight.

The typical starting dosage is 0.01 to 0.03 milligrams per kilogram (mg/kg) of body weight per day. This is divided into two or three doses per day. Your child’s doctor can determine the right dosage.

Your child’s doctor may continue to adjust the dose until the seizure disorder is well managed. Klonopin is not approved to treat panic disorder in children. So there is no approved children’s dosage for this use.

What if I Miss a Dose?

If you miss a dose of Klonopin, you should take it as soon as possible. But if it’s almost time for your next scheduled dose, you should skip the missed dose and take your next dose as usual.

You should not take extra doses to make up for a missed dose. Taking extra doses may increase your risk for side effects. To help make sure that you don’t miss a dose, try using a medication reminder. This can include setting an alarm or timer on your phone or downloading a reminder app. A kitchen timer can work, too.

Please leave your comments and questions in the comment box below. Feel free to share this information on your social media pages.

CSN Team.

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