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# Clobazam (oral formulation)
## Overview
Clobazam is a benzodiazepine derivative with anticonvulsant properties. It is thought to exert its effects by enhancing gamma-aminobutyric acid (GABA) inhibitory neurotransmission.
## Primary Indications
* Adjunctive treatment of seizures associated with Lennox-Gastaut syndrome (LGS) in patients 2 years of age and older.
## Adult Dosing
* **Lennox-Gastaut Syndrome (LGS):**
* Initiation: 5 mg twice daily.
* Maintenance: Dose can be increased by 5 mg to 10 mg every week based on clinical response and tolerability.
* Maximum recommended dose: 20 mg twice daily (40 mg total daily dose).
## Pediatric Dosing
* **Lennox-Gastaut Syndrome (LGS):**
* **2 to less than 10 years of age:**
* Initiation: 5 mg once daily.
* Maintenance: Dose can be increased by 2.5 mg to 5 mg every week based on clinical response and tolerability.
* Maximum recommended dose: 10 mg twice daily (20 mg total daily dose).
* **10 years of age and older:**
* Initiation: 5 mg twice daily.
* Maintenance: Dose can be increased by 5 mg to 10 mg every week based on clinical response and tolerability.
* Maximum recommended dose: 20 mg twice daily (40 mg total daily dose).
## Dose Adjustments
* **Hepatic Impairment:** Use with caution. No specific dose adjustments are established, but lower doses may be warranted due to reduced clearance.
* **Renal Impairment:** Use with caution. No specific dose adjustments are established.
## Contraindications
* Hypersensitivity to clobazam, other benzodiazepines, or any component of the formulation.
## Adverse Effects
* **Common:** Somnolence, decreased appetite, constipation, drooling, lethargy, pneumonia, upper respiratory tract infection, irritability, aggression, pyrexia, vomiting.
* **Serious:** Severe dermatologic reactions (e.g., Stevens-Johnson syndrome, toxic epidermal necrolysis), suicidal behavior and ideation, withdrawal symptoms (gradual tapering is essential), respiratory depression, dependence and abuse potential.
## Key Drug Interactions
* **CNS Depressants (e.g., alcohol, opioids, other sedatives):** Additive CNS depression. Use with extreme caution.
* **CYP3A4 Inhibitors/Inducers:** Clobazam is metabolized by CYP3A4. Strong inhibitors may increase clobazam levels, while strong inducers may decrease levels. Specific interactions with other antiepileptic drugs (AEDs) can alter clobazam or AED exposure.
* **CNS Stimulants:** May antagonize the sedative effects of clobazam.
## Monitoring
* Monitor for clinical effectiveness in seizure control.
* Monitor for adverse effects, especially somnolence, lethargy, respiratory changes, and behavioral changes.
* Monitor for signs of withdrawal if discontinuing therapy; gradual tapering is recommended.
* Monitor for signs and symptoms of suicidal behavior or ideation.
* Monitor for severe dermatologic reactions.
## Clinical Pearls
* Clobazam should be initiated at a low dose and gradually titrated upwards to minimize adverse effects.
* Abrupt discontinuation can lead to withdrawal symptoms. Taper the dose slowly.
* Due to the risk of somnolence, caution patients about operating heavy machinery or driving until they know how clobazam affects them.
* Consider drug interactions, especially with other CNS depressants and AEDs.
* Clobazam is often used as an adjunctive therapy.
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This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant literature for complete details and to verify dosing and safety in the context of individual patient circumstances.
