Morphine Sulphate Mercury Pharmaceuticals (Ireland) (Morphine Sulfate)

Morphine Sulfate is an opioid analgesic used in the management of severe pain through epidural or intrathecal administration.

• Severe acute pain: provides rapid, potent analgesia for patients experiencing intense short‑term pain.
• Post‑operative pain: reduces pain after surgical procedures when administered via epidural or intrathecal routes.
• Cancer pain: offers continuous pain control for malignant disease‑related discomfort.
• Epidural analgesia: delivers localized pain relief during labor or major surgeries.
• Intrathecal analgesia: provides targeted spinal analgesia for chronic or refractory pain conditions.

• Morphine Sulfate acts as an agonist at µ‑opioid receptors in the central nervous system, especially within the spinal cord and brainstem. Receptor activation inhibits adenylate cyclase, reduces calcium influx, and enhances potassium efflux, which together diminish neuronal excitability and suppress nociceptive transmission, producing analgesia and sedation.

Morphine Sulfate may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Nausea: feeling of sickness or urge to vomit.
• Constipation: reduced bowel movements and hard stools.
• Drowsiness: increased sleepiness or fatigue.
• Pruritus: itching of the skin.

Serious or Rare Side Effects

• Respiratory depression: slowed or shallow breathing that can be life‑threatening.
• Severe hypotension: significant drop in blood pressure.
• Allergic reaction: rash, swelling, or anaphylaxis.

When using Morphine Sulfate, careful assessment and monitoring are essential to minimize risks.

• Assess respiratory function: monitor breathing rate and oxygen saturation regularly.
• Evaluate renal and hepatic function: adjust use in patients with impaired clearance.
• Avoid concurrent CNS depressants: limit use with benzodiazepines or alcohol.
• Use caution in the elderly: increased sensitivity to opioid effects.
• Pregnancy and lactation: consider risk‑benefit, as drug crosses placenta and appears in breast milk.
• Store at ambient temperature: keep below 25 °C, protect from moisture and light in original packaging.

Morphine Sulfate can interact with other medicines, altering its efficacy or safety profile.

Major Interactions (Avoid)

• Other opioids: additive respiratory depression and sedation.
• Central nervous system depressants (e.g., benzodiazepines, barbiturates): heightened sedation and respiratory risk.
• MAO inhibitors: risk of severe hypertension or serotonin syndrome.

Moderate Interactions (Monitor Closely)

• CYP3A4 inhibitors (e.g., ketoconazole, erythromycin): may increase morphine levels.
• CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce analgesic effect.
• Anticholinergic agents: may worsen constipation.