Clonazepam: Uses, Dosage, Side Effects & Brands | MedexInfo

Clonazepam

Rx Only

Therapeutic ClassBenzodiazepine

Common Dose0.5–2 mg daily

Max / 24h4 mg

PregnancyCategory D

Indications ▼

Seizure disorders (absence, myoclonic, Lennox-Gastaut)

Panic disorder with or without agoraphobia

Adjunct therapy for anxiety and muscle spasm

Mechanism & Pharmacokinetics ▼

Mechanism: Enhances GABA-A receptor activity in the CNS, producing inhibitory, anticonvulsant, anxiolytic, and sedative effects.

Pharmacokinetics: Rapid oral absorption; peak plasma 1–4 hr; extensively metabolized in liver; excreted mainly via urine; half-life ~18–50 hr.

Dosage & Administration ▼

Patient Category	Recommended Dose	Max / 24h
Adults	0.5 mg twice daily, titrate as needed	4 mg
Elderly	0.25 mg twice daily, titrate cautiously	2 mg
Children (≥6 yr)	0.01–0.03 mg/kg/day in divided doses	0.1 mg/kg/day

Take at the same time daily; can be taken with or without water, with or without food.

Side Effects ▼

Common: Drowsiness, dizziness, fatigue, ataxia

Occasional: Memory impairment, irritability, confusion

Rare: Respiratory depression, severe hypotension, paradoxical reactions

Contraindications ▼

Hypersensitivity to clonazepam or other benzodiazepines

Severe respiratory insufficiency

Acute narrow-angle glaucoma

Severe hepatic impairment

Drug Interaction ▼

Alcohol: additive CNS depression

Other CNS depressants: additive sedation

CYP3A4 inhibitors: may increase plasma levels

Pregnancy & Lactation ▼

Category D: use only if benefit outweighs risk

Excreted in breast milk; avoid breastfeeding or monitor infant

Clinical / Research Summary ▼

Seizure Control: Effective for absence, myoclonic, and Lennox-Gastaut seizures.

Panic Disorders: Reduces frequency and severity of panic attacks; anxiolytic efficacy appears within weeks.

Pharmacokinetic Advantage: Long half-life allows twice-daily dosing with sustained therapeutic effect.

Safety Profile: Generally well-tolerated; sedation and dizziness most common.

Current Research Focus: Cognitive effects, long-term safety in elderly, combination therapy in resistant seizure syndromes.

Storage & Handling ▼

Store at 20–25°C; protect from moisture & light

Keep out of reach of children

Patient Counseling Points ▼

How to take: Take orally, usually twice daily; do not stop abruptly

Missed dose: Take as soon as remembered unless near next dose; do not double

Possible side effects: Sedation, dizziness, fatigue; avoid driving if affected

Monitor: Watch for respiratory depression and excessive sedation

Drug interactions: Inform provider about CNS depressants and alcohol use

Lifestyle advice: Avoid alcohol, limit other sedatives, maintain regular schedule

Pregnancy and safety: Only if prescribed; monitor breastfeeding infant

Brand Names (Bangladesh & Global) ▼

Bangladesh (Local Brands):

Clonotril Rivotril

Global / International Brands:

Klonopin Rivotril

Medical Disclaimer: This clinical summary is for informational purposes only. Always follow guidance from a qualified healthcare professional for dosage, interactions, and use.

Reference Hubs:

• Drug Class: Benzodiazepines • Conditions: Seizures & Panic Disorders • Pathway: GABA-A Receptor Modulation • Clinical Evidence & Trials