Kodein Extractumpharma (Codeine Phosphate Hemihydrate)

Codeine phosphate hemihydrate is an opioid analgesic used in the management of pain and cough.

• Mild to moderate pain: provides analgesia to reduce discomfort in acute or chronic settings.
• Cough: suppresses the cough reflex in non‑productive coughs, improving patient comfort.
• Post‑operative pain: helps control pain after minor surgical procedures.
• Dental pain: alleviates pain associated with dental extractions or procedures.

• Codeine phosphate hemihydrate acts as an agonist at µ‑opioid receptors in the central nervous system, with lesser activity at κ and δ receptors. Activation of these receptors inhibits the transmission of nociceptive signals, producing analgesia, and also depresses the cough centre in the medulla, resulting in cough suppression.

Codeine phosphate hemihydrate may cause a range of adverse reactions, most of which are dose‑related and reversible.

Common Side Effects

• Nausea: feeling of stomach upset or urge to vomit.
• Constipation: reduced bowel movements and hard stools.
• Drowsiness: increased sleepiness or reduced alertness.
• Dry mouth: reduced salivary flow leading to a parched sensation.

Serious or Rare Side Effects

• Respiratory depression: slowed or shallow breathing, potentially life‑threatening.
• Severe allergic reaction: rash, itching, swelling, or anaphylaxis.
• Hypotension: unusually low blood pressure causing dizziness or fainting.

When prescribing or dispensing Codeine phosphate hemihydrate, consider the following safety measures.

• Pain assessment: evaluate the severity and cause of pain before initiating therapy.
• Respiratory monitoring: observe for signs of respiratory depression, especially in opioid‑naïve patients.
• CNS depressant use: avoid concurrent use with alcohol, benzodiazepines, or other sedatives.
• Hepatic impairment: use with caution in patients with liver dysfunction, adjusting dose as needed.
• Dependence risk: limit duration of use and monitor for signs of misuse or addiction.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Codeine phosphate hemihydrate can interact with other medicines, altering its efficacy or safety profile.

Major Interactions (Avoid)

• CNS depressants (e.g., benzodiazepines, alcohol): may intensify sedation and respiratory depression.
• MAO inhibitors: can precipitate severe hypotension or serotonin syndrome.
• Opioid antagonists (e.g., naloxone): may reverse analgesic effects abruptly.

Moderate Interactions (Monitor Closely)

• CYP2D6 inhibitors (e.g., fluoxetine, quinidine): may reduce conversion of codeine to its active metabolite, decreasing analgesia.
• Antihistamines: can increase drowsiness.
• Diuretics: may enhance the risk of hypotension.