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Clonazepam is a prescription medication classified as a benzodiazepine, primarily used to control seizures and alleviate anxiety.

Last Modified: 21 May 2024

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What is Clonazepam? 

Clonazepam is a prescription medication classified as a benzodiazepine, primarily used to control seizures and alleviate anxiety. It contains active ingredients that enhance the brain's neurotransmitter gamma-aminobutyric acid (GABA). 

Clonazepam has a complex chemical structure, synthesized via a series of organic reactions that link chlorinated aromatic rings with a diazepine moiety, resulting in its anxiolytic and anticonvulsant properties. 

Global Name

Generic Names:

The generic name for the medication is Clonazepam. 

Global Brand Names:

Here are some of the brand names under which clonazepam is sold: 

  • Klonopin: This is one of the most well-known brand names for clonazepam, particularly in the United States. 
  • Rivotril: Common in many countries, including Canada, Mexico, Southeast Asia, Hong Kong and several European and South American countries. 
  • Clonotril: A brand available in some countries like India and Hong Kong. 
  • Clonex: This brand of clonazepam might be found in countries like Ireland. 
  • Zapiz: It is known to be available in India. 


What is Clonazepam used for? 

Clonazepam is prescribed for: 

  • Seizure disorders, including epilepsy 

How do you use Clonazepam? 


Clonazepam is available as an oral tablet, a disintegrating tablet, and, in some regions, an injectable solution. 

Dosage information:

  • Initial adult dose for seizures: 1.5 mg daily in divided doses. 
  • Pediatric dose for seizures: Depends on weight and age; typically lower than adult dosages. 
  • Adult dose for panic disorder: Starting at 0.25 mg twice daily. 


  • Children: This may be used with caution in children for seizures. 
  • Adults: Suitable for both seizure and panic disorder treatments. 
  • Elderlies: Lower dosages may be required due to increased sensitivity. 


Who cannot take Clonazepam?

  • Children: Not recommended for panic disorder. 
  • Adults: Not suitable for those with a history of benzodiazepine allergies. 
  • Elderlies: Should be used with caution; lower dosages are often necessary. 
  • Pregnancy and Lactation: There is positive evidence of human fetal risk based on adverse reaction data from investigational or marketing experience or studies in humans (US FDA Category D). . Use in breastfeeding may cause drowsiness in infants especially when used with other depressants. Potential benefits may outweigh the risks and physician consult is thus always advised. 


Allergies and unsuitability:

Patients with known allergies to benzodiazepines should not take Clonazepam. 


Any warnings and precautions :

Clonazepam may cause drowsiness and impair your ability to operate machinery or drive. It should be used with caution in people with a history of substance abuse, respiratory issues, or liver disease. It should be taken with or without food but be consistent to maintain even levels in your body. 

Interactions and contraindications:

Avoid using Clonazepam with alcohol, opioids, or other CNS depressants. It can also interact with various medications including antiepileptic drugs, antidepressants, and certain antibiotics. 

Side Effects

Potential side effects range from drowsiness, dizziness, and coordination problems to more severe issues like respiratory depression and dependency. 

Pharmacist Tips

  • Proper Administration: Follow your healthcare provider's instructions for taking Clonazepam. Don't change the dose without consulting your doctor.
  • Monitoring: Regularly see a healthcare professional to assess Clonazepam's effectiveness and monitor for side effects or dependency, especially for long-term use.
  • Avoiding Interactions:  Inform your pharmacist or doctor about all medications, including over-the-counter drugs and supplements, to prevent dangerous interactions.
  • Drowsiness and Alertness: Clonazepam may cause drowsiness and impair reaction time. Avoid activities requiring mental alertness until you understand their effects.
  • Alcohol and Substance Use: Avoid alcohol and recreational drugs while taking Clonazepam to prevent increased sedation and respiratory depression risks.
  • Dependency Risks: Watch for signs of dependency and withdrawal. Use the medication as prescribed and seek medical guidance before discontinuing to avoid withdrawal symptoms.
  • Storage Information: Store Clonazepam at room temperature securely away from children and pets.
  • Handling Instructions: When using the disintegrating tablet form, ensure dry hands and open the package only when ready to take.
  • Disposal: Ask your pharmacist about proper disposal methods for leftover or expired Clonazepam to prevent misuse.
  • Traveling with Medication: Keep Clonazepam in its original container, labeled with your prescription. Familiarize yourself with medication laws, particularly for international travel.
  • Regular Checkups: Schedule regular appointments with your healthcare provider to assess the need for ongoing Clonazepam treatment and adjust the plan if necessary.



Where is Clonazepam available in Hong Kong?

 Clonazepam is a prescription medication that can be prescribed by healthcare providers.


Is Clonazepam addictive?

Yes, it can be, so it should be used as prescribed. 

Does Clonazepam interact with other medications?

Yes, it can interact with several drugs; consult your doctor for specifics.

Is Clonazepam available for purchase over the counter?

No, it requires a prescription due to its potential for abuse and dependence.

How long does Clonazepam stay in your system?

Clonazepam has a long elimination half-life, typically ranging from 30 to 40 hours, although it can be longer in some individuals. Depending on the dosage, frequency of use, metabolism, age, and overall health.


This website provides content related to drug use and medicine for informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Do not use the information on this website to diagnose or treat a health problem or disease without consulting a qualified healthcare provider. The website's owners and contributors are not liable for any repercussions, adverse effects, or consequences resulting from the use of any medication or information provided herein.

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