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Basic Drug Info
Drug Name:Clonazepam
Manufacturer:Watson Laboratories, Inc.
Other Info:



Clinical Trials:


Indications and Usage

Seizure Disorders: Clonazepam is useful alone or as an adjunct in the treatment of the Lennox-Gastaut syndrome (petit mal variant), akinetic and myoclonic seizures.

In patients with absence seizures (petit mal) who have failed to respond to succinimides, clonazepam may be useful.In some studies, up to 30% of patients have shown a loss of anticonvulsant activity, often within three months of administration.

In some cases, dosage adjustment may re-establish efficacy.Panic Disorder: Clonazepam is indicated for the treatment of panic disorder, with or without agoraphobia, as defined in DSM-IV.

Panic disorder is characterized by the occurrence of unexpected panic attacks and associated concern about having additional attacks, worry about the implications or consequences of the attacks, and/or a significant change in behavior related to the attacks.The efficacy of clonazepam was established in two 6- to 9-week trials in panic disorder patients whose diagnoses corresponded to the DSM-lllR category of panic disorder (seeCLINICAL PHARMACOLOGY: Clinical Trials).Panic disorder (DSM-IV) is characterized by recurrent unexpected panic attacks, i.e., a discrete period of intense fear or discomfort in which four (or more) of the following symptoms develop abruptly and reach a peak within 10 minutes: (1) palpitations, pounding heart or accelerated heart rate; (2) sweating; (3) trembling or shaking; (4) sensations of shortness of breath or smothering; (5) feeling of choking; (6) chest pain or discomfort; (7) nausea or abdominal distress; (8) feeling dizzy, unsteady, lightheaded or faint; (9) derealization (feelings of unreality) or depersonalization (being detached from oneself); (10) fear of losing control; (11) fear of dying; (12) paresthesias (numbness or tingling sensations); (13) chills or hot flushes.The effectiveness of clonazepam in long-term use, that is, for more than 9 weeks, has not been systematically studied in controlled clinical trials.

The physician who elects to use clonazepam for extended periods should periodically re-evaluate the long-term usefulness of the drug for the individual patient (seeDOSAGE AND ADMINISTRATION).
Epilepsy -- A disorder characterized by recurrent episodes of paroxysmal brain dysfunction due to a sudden, disorderly, and excessive neuronal discharge. Epilepsy classification systems are generally based upon: (1) clinical features of the seizure episodes (e.g., motor seizure), (2) etiology (e.g., post-traumatic), (3) anatomic site of seizure origin (e.g., frontal lobe seizure), (4) tendency to spread to other structures in the brain, and (5) temporal patterns (e.g., nocturnal epilepsy). (From Adams et al., Principles of Neurology, 6th ed, p313)

Myoclonic Epilepsy -- A clinically diverse group of epilepsy syndromes characterized either by myoclonic seizures or by myoclonus in association with other seizure types. Myoclonic epilepsy syndromes are divided into three subtypes based on etiology: familial, cryptogenic, and symptomatic (i.e., occurring secondary to known disease processes such as infections, hypoxic-ischemic injuries, trauma, etc.).

PANIC DISORDER 1 --

Sensory Discomfort -- A feeling of mental or physical uneasiness, pain, or distress.

Symptoms -- An indication that a person has a condition or disease. Some examples of symptoms are headache, fever, fatigue, nausea, vomiting, and pain.

Trembling --

Chest Pain -- Pressure, burning, or numbness in the chest.

Nausea -- An unpleasant sensation in the stomach usually accompanied by the urge to vomit. Common causes are early pregnancy, sea and motion sickness, emotional stress, intense pain, food poisoning, and various enteroviruses.

Lightheadedness --

Numbness --

Chills -- The sudden sensation of being cold. It may be accompanied by SHIVERING.

Hot flushes -- A sudden, temporary onset of body warmth, flushing, and sweating (often associated with menopause).

Menopausal hot flushes -- A sudden, temporary sensation of heat predominantly experienced by some women during MENOPAUSE. (Random House Unabridged Dictionary, 2d ed)

Contraindications

Clonazepam should not be used in patients with a history of sensitivity to benzodiazepines, nor in patients with clinical or biochemical evidence of significant liver disease.

It may be used in patients with open angle glaucoma who are receiving appropriate therapy but is contraindicated in acute narrow angle glaucoma.
Liver diseases -- Pathological processes of the LIVER.

Open Angle Glaucoma -- Glaucoma in which the angle of the anterior chamber is open and the trabecular meshwork does not encroach on the base of the iris.

Angle Closure Glaucoma -- A form of glaucoma in which the intraocular pressure increases because the angle of the anterior chamber is blocked and the aqueous humor cannot drain from the anterior chamber.

Warnings

Since clonazepam produces CNS depression, patients receiving this drug should be cautioned against engaging in hazardous occupations requiring mental alertness, such as operating machinery or driving a motor vehicle.

They should also be warned about the concomitant use of alcohol or other CNS-depressant drugs during clonazepam therapy (seePRECAUTIONS: Drug Interactions andInformation for Patients).
Branded Drugs
The following US Branded drugs contain Clonazepam


KLONOPIN RAPIDLY DISINTEGRATING -- HOFFMANN LA ROCHE INC

KLONOPIN -- HOFFMANN LA ROCHE INC


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