Myoflexin (Chlorzoxazone)

Chlorzoxazone, the active ingredient in Myoflexin, is a centrally acting muscle relaxant presented as an oral tablet for oral use. It is indicated for the relief of muscle spasm and associated musculoskeletal pain in adult patients.

GNH USA supplies Myoflexin as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide, ensuring quality‑controlled manufacturing and regulatory compliance across EU and global markets. The company provides reliable logistics and documentation for cross‑border procurement.

Chlorzoxazone acts on the central nervous system to reduce skeletal muscle spasm and related pain.

- Muscle spasm: alleviates involuntary muscle contraction and associated discomfort. - Musculoskeletal pain: reduces pain and stiffness in strains, sprains, and overuse injuries. - Acute low‑back pain: helps relieve spasm‑related pain in the lumbar region.

Adverse reactions may occur with chlorzoxazone therapy.

Common Side Effects: - Drowsiness: mild to moderate sedation. - Dizziness: sensation of light‑headedness or unsteadiness. - Nausea: occasional upset stomach. - Headache: transient cranial discomfort. - Fatigue: reduced energy levels. - Gastrointestinal upset: abdominal discomfort or mild diarrhea.

Serious or Rare Side Effects: - Skin reactions: rash, erythema, or Stevens‑Johnson syndrome. - Hepatotoxicity: elevated liver enzymes or hepatitis. - Hematologic abnormalities: agranulocytosis, leukopenia, or thrombocytopenia. - Severe hypotension: marked drop in blood pressure. - Anaphylaxis: acute allergic response requiring emergency care.

Before prescribing chlorzoxazone, clinicians should consider several safety factors.

- Liver function assessment: monitor hepatic enzymes during therapy. - Severe hepatic impairment: avoid or use with caution. - Concomitant CNS depressants: increased risk of sedation and respiratory depression. - Alcohol consumption: may potentiate central nervous system effects. - Pregnancy and lactation: safety not established; use only if benefit outweighs risk. - Store at room temperature: keep in the original pack, protect from moisture.

Chlorzoxazone can interact with other medicines, requiring attention to avoid adverse outcomes.

Major Interactions (Avoid): - CNS depressants (e.g., benzodiazepines, opioids): may cause excessive sedation. - Alcohol: synergistic central nervous system depression.

Moderate Interactions (Monitor Closely): - MAO inhibitors: potential for heightened hypotensive effects. - Other muscle relaxants: additive muscle‑relaxant activity. - CYP2E1 inhibitors (e.g., disulfiram): may increase chlorzoxazone plasma levels.