Movicol (Sodium Hydrogen Carbonate, Potassium Chloride, Sodium Chloride, Macrogol 3350)

• Movicol is an osmotic laxative indicated for conditions affecting bowel transit and stool consistency.
• Constipation: softens stool and facilitates regular bowel movements.
• Faecal impaction: helps to break down hardened stool masses for easier evacuation.
• Bowel preparation prior to diagnostic procedures: clears the intestinal tract to improve visibility during endoscopic examinations.

• Macrogol 3350 creates an osmotic gradient within the intestinal lumen that retains water, increasing stool water content. The resulting softened stool stimulates peristalsis, enhancing transit and promoting evacuation without stimulating intestinal muscle directly.

Movicol may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Abdominal bloating: feeling of fullness or swelling in the abdomen.
• Flatulence: increased intestinal gas.
• Nausea: mild sensation of wanting to vomit.
• Mild abdominal pain or cramps.
• Diarrhoea: loose stools occurring more frequently.
• Thirst: increased desire to drink fluids.

Serious or Rare Side Effects

• Severe electrolyte imbalance: abnormal levels of sodium, potassium or chloride.
• Severe dehydration: significant loss of body water.
• Allergic reactions: rash, itching, swelling, or difficulty breathing.
• Severe abdominal pain: intense or persistent pain.
• Rectal bleeding: visible blood in stool.
• Acute renal failure: sudden loss of kidney function.

• Before prescribing Movicol, clinicians should consider patient-specific factors and monitor for potential complications.
• Assess renal function: evaluate kidney health to avoid accumulation of electrolytes.
• Monitor electrolytes: check serum sodium, potassium and chloride during prolonged use.
• Use with caution in the elderly: increased sensitivity to fluid shifts.
• Avoid in complete intestinal obstruction: risk of worsening blockage.
• Adjust dose in hepatic impairment: consider reduced clearance.
• Store at ambient temperature: keep in the original container, protect from moisture and heat.

Movicol can interact with other medications that affect fluid or electrolyte balance.

Major Interactions (Avoid)

• Concomitant use with other osmotic laxatives: risk of excessive fluid loss.
• Loop diuretics: may exacerbate electrolyte disturbances.
• Lithium therapy: altered lithium plasma concentrations.

Moderate Interactions (Monitor Closely)

• Anticholinergic agents: may reduce laxative efficacy.
• Non‑steroidal anti‑inflammatory drugs (NSAIDs): increased risk of renal impairment.
• Calcium supplements: potential reduction in drug absorption.