Myolgin (Paracetamol, Thiocolchicoside)

Myolgin, containing paracetamol and thiocolchicoside, is indicated for conditions involving pain and muscle spasm.

• Mild to moderate pain: provides analgesic effect to reduce discomfort.
• Muscle spasm associated with musculoskeletal conditions: relaxes skeletal muscles to improve mobility.
• Fever: lowers elevated body temperature through antipyretic action.

• Paracetamol acts centrally by inhibiting cyclooxygenase enzymes and reducing prostaglandin synthesis, producing analgesic and antipyretic effects. Thiocolchicoside competitively antagonizes glycine receptors and modulates GABAergic transmission, leading to skeletal muscle relaxation. The combined action addresses both pain perception and muscle tone.

Adverse reactions may occur with Myolgin and are categorized by frequency.

Common Side Effects

• Nausea: mild gastrointestinal upset.
• Dizziness: transient light‑headedness.
• Drowsiness: increased sleepiness.
• Headache: mild to moderate intensity.
• Dry mouth: reduced salivation.
• Gastrointestinal discomfort: mild abdominal pain or indigestion.

Serious or Rare Side Effects

• Severe skin reactions: such as Stevens‑Johnson syndrome.
• Hepatotoxicity: potential liver injury with excessive dosing.
• Allergic reactions: rash, pruritus, or anaphylaxis.
• Blood disorders: rare cases of neutropenia or thrombocytopenia.
• Seizures: very rare, especially with high doses of thiocolchicoside.

When prescribing Myolgin, consider the following precautions.

• Assess liver function: evaluate baseline hepatic status in patients with liver disease.
• Avoid alcohol: concurrent use may increase risk of hepatotoxicity.
• Monitor for allergic reactions: discontinue if rash or hypersensitivity occurs.
• Use caution in renal impairment: adjust therapy as clinically indicated.
• Pregnancy and breastfeeding: consult a healthcare professional before use.
• Store at ambient temperature: keep in the original pack, protect from moisture and heat.

Myolgin may interact with other medicines; awareness of interaction severity is essential.

Major Interactions (Avoid)

• Alcohol: increased risk of liver injury.
• Other hepatotoxic drugs (e.g., isoniazid, valproate): additive hepatic toxicity.
• Central nervous system depressants (e.g., benzodiazepines, opioids): enhanced sedation.

Moderate Interactions (Monitor Closely)

• Warfarin: paracetamol may potentiate anticoagulant effect.
• Antiepileptic drugs (e.g., carbamazepine): may reduce thiocolchicoside levels.
• Anticholinergic agents: may increase anticholinergic burden.