Generic Name: clonazepam (kloe NAZ e pam)
Brand Name: KlonoPIN
What is clonazepam?
Clonazepam is a benzodiazepine (ben-zoe-dye-AZE-eh-peen). Clonazepam affects chemicals in the brain that may be unbalanced. Clonazepam is also a seizure medicine, also called an anti-epileptic drug.
Clonazepam is used to treat certain seizure disorders (including absence seizures or Lennox-Gastaut syndrome) in adults and children.
Clonazepam is also used to treat panic disorder (including agoraphobia) in adults.
Clonazepam may also be used for purposes not listed in this medication guide.
What is the most important information I should know about clonazepam?
You should not use this medicine if you have narrow-angle glaucoma or severe liver disease, or if you are allergic to Valium or a similar medicine.
Call your doctor if you have any new or worsening symptoms of depression, unusual changes in behavior, or thoughts about suicide or hurting yourself.
Clonazepam may be habit-forming. Never share clonazepam with another person. Keep the medication in a place where others cannot get to it. Selling or giving away this medicine is against the law.
What should I discuss with my healthcare provider before taking clonazepam?
You should not take clonazepam if you have:
severe liver disease; or
a history of allergic reaction to any benzodiazepine, such as diazepam (Valium), alprazolam (Xanax), lorazepam (Ativan), chlordiazepoxide, flurazepam, and others.
To make sure clonazepam is safe for you, tell your doctor if you have:
kidney or liver disease;
asthma, emphysema, bronchitis, chronic obstructive pulmonary disorder (COPD), or other breathing problems;
porphyria (a genetic enzyme disorder that causes symptoms affecting the skin or nervous system);
a history of depression or suicidal thoughts or behavior;
a history of mental illness, psychosis, or addiction to drugs or alcohol; or
if you use a narcotic (opioid) medication.
Some people have thoughts about suicide when taking seizure medication. Your doctor should check your progress at regular visits. Your family or other caregivers should also be alert to changes in your mood or symptoms.
Follow your doctor's instructions about taking seizure medication if you are pregnant. Do not start or stop taking this medicine without your doctor's advice, and tell your doctor right away if you become pregnant. Clonazepam may cause harm to an unborn baby, and may cause breathing or feeding problems in a newborn. But having seizures during pregnancy could harm both mother and baby.
If you are pregnant, your name may be listed on a pregnancy registry. This is to track the outcome of the pregnancy and to evaluate any effects of clonazepam on the baby.
Clonazepam can pass into breast milk and may harm a nursing baby. You should not breast-feed while using this medicine.
Do not give this medicine to a child without medical advice. Clonazepam is not approved to treat panic disorder in anyone younger than 18 years old.
The sedative effects of clonazepam may last longer in older adults. Accidental falls are common in elderly patients who take benzodiazepines. Use caution to avoid falling or accidental injury while you are taking clonazepam.
How should I take clonazepam?
Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not use this medicine in larger or smaller amounts or for longer than recommended.
Clonazepam may be habit-forming. Never share this medicine with another person, especially someone with a history of drug abuse or addiction. Keep the medication in a place where others cannot get to it.
Misuse of habit-forming medicine can cause addiction, overdose, or death. Selling or giving away this medicine is against the law.
Clonazepam should be used for only a short time. Do not take this medication for longer than 9 weeks without your doctor's advice.
Swallow the regular clonazepam tablet whole, with a full glass of water.
To take the orally disintegrating tablet:
Keep the tablet in its blister pack until you are ready to take it. Open the package and peel back the foil. Do not push a tablet through the foil or you may damage the tablet.
Use dry hands to remove the tablet and place it in your mouth.
Do not swallow the tablet whole. Allow it to dissolve in your mouth without chewing.
Swallow several times as the tablet dissolves. If desired, you may drink liquid to help swallow the dissolved tablet.
If you use this medicine long-term, you may need frequent medical tests.
Do not stop using clonazepam suddenly or you could have unpleasant withdrawal symptoms, including a seizure (convulsions). Ask your doctor how to safely stop using this medicine.
Call your doctor if this medicine seems to stop working as well in treating your seizures or anxiety symptoms.
Seizures are often treated with a combination of drugs. Use all medications as directed by your doctor. Read the medication guide or patient instructions provided with each medication. Do not change your doses or medication schedule without your doctor's advice.
Store at room temperature away from moisture, heat, and light.
Keep track of the amount of medicine used from each new bottle. Clonazepam is a drug of abuse and you should be aware if anyone is using your medicine improperly or without a prescription.
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include extreme drowsiness, confusion, muscle weakness, fainting, or coma.
What should I avoid while taking clonazepam?
Avoid drinking alcohol. Dangerous side effects could occur.
Clonazepam may impair your thinking or reactions. Avoid driving or operating machinery until you know how this medicine will affect you. Dizziness or severe drowsiness can cause falls or other accidents.
Clonazepam side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Report any new or worsening symptoms to your doctor, such as: mood or behavior changes, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), more depressed, or have thoughts about suicide or hurting yourself.
Call your doctor at once if you have:
new or worsening seizures;
unusual changes in mood or behavior;
confusion, aggression, hallucinations;
thoughts of suicide or hurting yourself;
weak or shallow breathing;
pounding heartbeats or fluttering in your chest; or
unusual or involuntary eye movements.
Common side effects may include:
feeling tired or depressed;
memory problems; or
problems with balance or coordination.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect clonazepam?
Taking clonazepam with other drugs that make you sleepy or slow your breathing can cause dangerous side effects or death. Ask your doctor before taking a sleeping pill, narcotic pain medicine, prescription cough medicine, a muscle relaxer, or medicine for anxiety, depression, or seizures.
Other drugs may interact with clonazepam, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using.
More about Klonopin (clonazepam)
- Other brands: Klonopin Wafer
Related treatment guides
Where can I get more information?
- Your pharmacist can provide more information about clonazepam.
- Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
- Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.
Copyright 1996-2012 Cerner Multum, Inc. Version: 6.04.
Date modified: January 10, 2017
Last reviewed: September 28, 2016