Please check your internet connection and try again.
# Clobazam (Oral Formulation)
## Overview
Clobazam is a 1,5-benzodiazepine with anticonvulsant properties. Unlike 1,4-benzodiazepines (e.g., diazepam), it has a unique structure that may offer a more favorable side-effect profile regarding sedation and cognitive impairment, though tolerance often develops with chronic use.
## Primary Indications
* Adjunctive therapy for seizures associated with Lennox-Gastaut Syndrome (LGS).
## Adult Dosing
* **Initial Dose:** 10 mg/day.
* **Titration:** Increase to 20 mg/day after 1 week. If tolerated, may increase to 40 mg/day after another week.
* **Maximum Dose:** 40 mg/day. Doses >5 mg/day should be administered in two divided doses.
## Pediatric Dosing (≥2 years)
* **Weight-based dosing (<30 kg):**
* Initial: 5 mg/day.
* Titration: Increase to 10 mg/day after 1 week, then 20 mg/day after the second week.
* **Weight-based dosing (≥30 kg):**
* Follow adult titration schedule (10 mg to 20 mg to 40 mg/day).
## Dose Adjustments
* **Hepatic Impairment:** Reduce initial starting dose and titrate more slowly. In severe impairment (Child-Pugh C), use with extreme caution or avoid.
* **Renal Impairment:** No specific adjustment defined, but monitor closely as metabolites are renally excreted.
* **CYP2C19 Poor Metabolizers:** Clobazam levels may be 2-fold higher; consider starting at lower doses and titrating more cautiously.
## Contraindications
* Known hypersensitivity to clobazam.
* History of severe allergic reactions to other benzodiazepines.
## Adverse Effects
* **Very Common:** Somnolence, sedation, lethargy, drooling (sialorrhea), constipation, pyrexia, behavioral changes (aggression/irritability).
* **Serious:** Severe dermatological reactions (SJS/TEN), respiratory depression, physical dependence, abuse potential, and increased suicidal ideation.
## Key Drug Interactions
* **CNS Depressants:** Enhances sedation (alcohol, opioids, other benzodiazepines).
* **CYP2C19 Inducers/Inhibitors:** Fluconazole, fluvoxamine, and ticlopidine (inhibitors) can significantly increase clobazam levels.
* **Hormonal Contraceptives:** Clobazam may decrease the efficacy of hormonal contraceptives; use additional barrier protection.
* **Valproate:** May increase concentrations of N-desmethylclobazam (active metabolite).
## Monitoring
* **Clinical:** Monitor for seizure control, signs of sedation, behavioral changes, and depression.
* **Safety:** Monitor for skin rashes (discontinue immediately if rash occurs).
* **Withdrawal:** Taper dose gradually when discontinuing to prevent status epilepticus or withdrawal seizures.
## Clinical Pearls
* **Active Metabolite:** The active metabolite, N-desmethylclobazam, has a significantly longer half-life than the parent drug, contributing to steady-state accumulation.
* **Administration:** Tablets can be crushed and mixed with applesauce; the oral suspension should be shaken well before use, and an oral syringe is typically required for accurate dosing.
* **Tolerance:** Effectiveness may diminish over time due to the development of pharmacodynamic tolerance.
* **Controlled Substance:** Schedule IV; risk of abuse and physical dependence.
***
**Disclaimer:** This information is for educational purposes and reflects general clinical standards. Dosing and safety protocols may vary by institutional policy or specific patient factors. Always verify current prescribing information (e.g., package insert or clinical databases like Lexicomp/UpToDate) before prescribing or administering medication.
