Descripción

Codeine – Mild Opioid Analgesic & Antitussive (Rx / Controlled in Many Regions)

Codeine is a mild opioid analgesic and antitussive (cough suppressant) used for the treatment of mild to moderate pain and dry cough when other non-opioid options are not sufficient.

After administration, codeine is partially converted in the liver into morphine (via CYP2D6 enzyme), which provides its pain-relieving effect. Because of this conversion, response to codeine can vary significantly between individuals.

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 Detalles clave

• Active Ingredient: Codeine phosphate (commonly)
• Drug Class: Weak opioid analgesic
• Indicaciones:
  • Mild to moderate pain
  • Dry, non-productive cough
• Mechanism of Action: Prodrug → partial conversion to morphine → μ-opioid receptor activation
• Estado de la prescripción: Medicamento de prescripción controlada en muchos países

 Especificaciones

• Dosage Forms: Tablets, capsules, oral syrup
• Common Strengths: 15 mg, 30 mg, 60 mg (varies by country/formulation)
• Onset of Action: ~30–60 minutes
• Duration of Action: ~4–6 hours
• Half-Life: ~3–4 hours
• Metabolism: Hepatic (CYP2D6 → morphine, CYP3A4 pathways)
• Excreción: Renal
• Almacenamiento: temperatura ambiente

 Dosis y administración

• Usually taken every 4–6 hours as needed
• Often combined with paracetamol (acetaminophen) for stronger analgesic effect
• Dose must be individualized by a healthcare provider
• Use is generally recommended for short-term treatment only

 Compatibilidad / Uso Adecuado

• Patients with mild to moderate pain not controlled by non-opioids
• Treatment of dry cough (in some formulations)
• Short-term pain management under medical supervision
• Not typically used for long-term chronic pain due to dependence risk

 Advertencias y precauciones

• Riesgo de dependencia, tolerancia y uso indebido
• Can cause respiratory depression at high doses or in sensitive individuals
• Effectiveness varies due to genetic differences in metabolism (CYP2D6 variability)
• Evite el alcohol y los sedantes debido a una mayor depresión del SNC
• Use caution in children, elderly, and respiratory disease

 Contraindicaciones

• Depresión respiratoria severa
• Asma aguda sin monitorización
• Known hypersensitivity to opioids
• Children in certain age groups (restricted in many countries)
• Use with MAO inhibitors (in some cases)

Why Codeine Is Used

Codeine is used as a step-up mild opioid option when standard pain relievers are insufficient, and also as a cough suppressant in selected cases. It is generally reserved for short-term use under medical supervision due to its opioid properties.