Mst Continus (Morphine Sulfate)

Morphine Sulfate is an opioid analgesic used to manage pain conditions that involve the central nervous system.

• Moderate to severe acute pain: provides rapid and effective relief after surgery or trauma.
• Cancer‑related pain: helps control persistent pain associated with malignant disease.
• Chronic severe pain: offers long‑term analgesia for conditions such as severe osteoarthritis when other treatments are insufficient.

• Morphine Sulfate acts as a full agonist at the mu‑opioid receptors in the central nervous system. Binding to these G‑protein‑coupled receptors inhibits the release of neurotransmitters involved in pain transmission, reduces neuronal excitability, and alters the perception of pain, resulting in analgesia.

Morphine Sulfate may cause a range of adverse reactions, from mild to life‑threatening.

Common Side Effects

• Nausea: feeling of sickness or urge to vomit.
• Constipation: reduced bowel movements and hard stools.
• Drowsiness: increased sleepiness or fatigue.
• Dizziness: sensation of light‑headedness or unsteadiness.
• Dry mouth: reduced salivation leading to throat discomfort.
• Sweating: excessive perspiration unrelated to temperature.

Serious or Rare Side Effects

• Respiratory depression: slowed or shallow breathing that can be fatal.
• Severe hypotension: marked drop in blood pressure causing faintness.
• Anaphylaxis: rapid, severe allergic reaction with rash, swelling, and airway compromise.
• Adrenal insufficiency: inadequate cortisol production leading to fatigue and weakness.
• Seizures: uncontrolled electrical activity in the brain.
• Dependence or addiction: compulsive use despite harmful consequences.

When prescribing or dispensing Morphine Sulfate, several safety considerations are essential.

• Assess pain severity: confirm that the pain level justifies opioid therapy.
• Evaluate organ function: check renal and hepatic status before initiating treatment.
• Monitor respiratory status: observe for signs of slowed breathing, especially after dose adjustments.
• Avoid concurrent CNS depressants: limit use with benzodiazepines, barbiturates, or alcohol.
• Use the lowest effective dose: titrate to achieve pain control while minimizing side effects.
• Store at below 25°C: keep in the original packaging, protect from moisture and direct sunlight.

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

Major Interactions (Avoid)

• CNS depressants (e.g., benzodiazepines, barbiturates): may cause profound respiratory depression.
• Monoamine oxidase inhibitors (MAOIs): increase risk of serotonin syndrome.
• Other opioids: additive effects on sedation and respiratory function.
• Alcohol: enhances central nervous system depression.
• Respiratory depressants (e.g., gabapentinoids): potentiate breathing suppression.

Moderate Interactions (Monitor Closely):\n- CYP3A4 inhibitors (e.g., erythromycin, ketoconazole): may raise morphine plasma levels.

• CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce analgesic effect.
• Antihistamines: can increase sedation.
• Diuretics: may exacerbate hypotension.
• Certain antidepressants (e.g., SSRIs): may increase risk of serotonin syndrome.