Clonazepam: Uses, Dosage, Side Effects, and Safety Information

Clonazepam is a benzodiazepine medication used to treat certain seizure disorders and panic disorder. It works by calming abnormal electrical activity in the brain, which helps control seizures and reduce panic attacks. Approved indications and available formulations may vary by country and product.

Clonazepam at a Glance

Approved indications and available formulations may vary by country and product.

Common Indications of Clonazepam

• Certain seizure disorders, including specific seizure types such as Lennox-Gastaut syndrome, akinetic and myoclonic seizures, and certain absence seizures that have not responded adequately to other treatments, depending on the product and country
• Panic disorder, with or without agoraphobia, in adults

Clonazepam is not a routine treatment for generalized anxiety disorder. Approved indications can vary by country and product.

Dosage and Administration

Clonazepam dosing depends on the condition being treated, the patient’s age, and their response to treatment. The figures below are examples from product labelling, not instructions for self-treatment. Only a doctor should start, adjust or stop this medicine.

Seizure Disorders

Clonazepam is generally started at a low dose and increased gradually by the doctor according to seizure type, response, age, tolerability, and other medicines. Dosing in children is weight- and indication-specific.

Panic Disorder

Treatment is generally started at a low dose and adjusted gradually under medical supervision. The appropriate dose varies between patients, and treatment should be individualized according to response and tolerability.

Clonazepam is available in oral tablets and, for some products, orally disintegrating tablets or wafers. Availability and administration instructions can vary by product and country. Where an orally disintegrating wafer is available, it is placed in the mouth immediately after opening the blister and dissolves in saliva, so it can be swallowed with or without water. Not every clonazepam brand has a wafer formulation.

Adverse Effects of Clonazepam

• Drowsiness and dizziness
• Memory problems
• Coordination difficulties and falls
• Impaired alertness, reaction time, and driving ability
• Risk of dependence with prolonged use

Do not drive or operate machinery until you know how clonazepam affects you.

Serious Risks: Get Medical Help Promptly

• Signs of abuse, misuse or physical dependence, or withdrawal symptoms (such as anxiety, tremor, or in some cases seizures) if the medicine is stopped or reduced too quickly
• Slowed or difficult breathing, extreme drowsiness, or unresponsiveness, especially if clonazepam is combined with opioids, alcohol, or other sedating medicines. Combining clonazepam with opioids can cause profound sedation and respiratory depression and may be fatal.
• Worsening depression, new or worsening suicidal thoughts, or unusual changes in mood or behaviour
• New or worsening seizures in people with a seizure disorder

Dependence and Withdrawal

Physical dependence can occur with regular use of clonazepam, even when taken as prescribed. Withdrawal symptoms can occur after a dose reduction or after stopping the medicine. Abrupt discontinuation can cause serious withdrawal symptoms. In people taking clonazepam for seizure disorders, sudden discontinuation can precipitate seizures, including status epilepticus. The dose should be tapered gradually, and only under medical supervision, since tapering must be individualized to the person and cannot follow a fixed schedule.

Contraindications of Clonazepam

• Hypersensitivity to clonazepam, other benzodiazepines, or any component of the product
• Significant liver disease
• Acute narrow-angle glaucoma

Precautions (not formal contraindications), requiring caution and medical judgement:

• Mild to moderate liver impairment
• History of alcohol or substance use disorder
• Depression or suicidal thoughts
• Myasthenia gravis
• Significant respiratory disease
• Sleep apnoea
• Use together with opioids or other CNS depressants

People with significant respiratory disease or sleep apnoea may have a higher risk of breathing problems and should discuss this with their doctor before using clonazepam. People with myasthenia gravis should tell their doctor before using clonazepam because benzodiazepines may worsen muscle weakness or breathing problems in susceptible patients.

Pregnancy, Liver, and Kidney Considerations

• Pregnancy: Clonazepam may pose risks to a developing baby, and human pregnancy data are limited. Do not start or stop it during pregnancy without your doctor’s advice; abrupt discontinuation of a necessary seizure medicine can also be dangerous to both mother and baby. Exposure late in pregnancy may cause neonatal sedation or other withdrawal or adaptation problems, and the baby may need monitoring after birth. Tell your doctor right away if you become pregnant.
• Breastfeeding: Clonazepam passes into breast milk and may cause sleepiness, poor feeding, or other effects in a nursing baby. Discuss breastfeeding with your doctor, particularly if clonazepam is being used regularly or at higher doses. The baby may need monitoring for excessive sleepiness or feeding problems.
• Liver: Clonazepam is contraindicated in significant liver disease. People with milder liver impairment should discuss its use with their doctor, who can consider the appropriate treatment and monitoring.
• Kidneys: Clonazepam may be used in people with kidney impairment, but your doctor should consider your overall health, other medicines, sedation risk, and kidney function when deciding how the medicine should be used.

Drug Interactions

Clonazepam can interact with other medicines and substances that increase sedation or slow breathing, including:

• Opioids
• Alcohol
• Other benzodiazepines
• Sedating antihistamines
• Sleep medicines
• Other CNS depressants

Combining clonazepam with any of these can increase the risk of excessive sedation and respiratory depression. Tell your doctor or pharmacist about all prescription medicines, over-the-counter medicines, supplements, and substances you use.

Popular Brands of Clonazepam

• India: Clonotril
• US: Klonopin

Brand availability, strengths, formulations, and approved uses may vary by country.

Approximate Price in India

Clonazepam 0.5 mg, 10 tablets: approximately ₹12–₹55 per strip, depending on the brand and formulation.

Prices may vary depending on the brand, strength, pack size, pharmacy, location, availability, and discounts. This is an approximate range and not a universal price for all clonazepam products.

How Healthpil Can Help

If you are taking clonazepam or have questions about seizures, panic disorder, side effects, dependence, or withdrawal, a qualified doctor can review your symptoms, medical history, current medicines, and whether clonazepam is appropriate for you. HealthPil can connect you with a qualified doctor for an online consultation. To book an appointment.