Microlax (Sodium Citrate, Sodium Lauryl Sulfoacetate)

Microlax, an osmotic and stimulant laxative, is used to manage conditions that require rapid bowel emptying, particularly when a swift and reliable effect is needed.

• Occasional constipation: provides quick softening of stool and facilitates evacuation.
• Diagnostic bowel preparation: clears the colon promptly before procedures such as colonoscopy or radiographic imaging.
• Acute bowel retention: offers rapid relief for sudden episodes of bowel blockage in adults.
• Pre‑operative preparation: empties the rectum before surgery to reduce infection risk.
• Travel‑related constipation: helps travelers experiencing temporary bowel slowdown.

• Sodium citrate creates an osmotic gradient that draws water into the lumen of the colon, increasing stool volume and softness. Sodium lauryl sulfoacetate acts as a surfactant, stimulating intestinal secretions and enhancing smooth‑muscle motility. The combined osmotic and stimulant actions produce a rapid increase in intraluminal pressure, leading to prompt evacuation of the bowel within minutes of rectal administration, effective.

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

Common Side Effects

• Mild abdominal cramping: discomfort in the lower abdomen after administration.
• Rectal irritation: transient burning or itching at the application site.
• Loose stools or diarrhea: increased frequency of watery bowel movements.
• Nausea: occasional feeling of queasiness.
• Flatulence: temporary gas buildup after use.
• Headache: mild headache reported by some users.

Serious or Rare Side Effects

• Severe abdominal pain: intense, persistent pain that may indicate intestinal obstruction and requires immediate medical evaluation.
• Rectal bleeding: unexpected bleeding from the rectal mucosa.
• Allergic reaction: rash, swelling, or difficulty breathing.

Before using Microlax, consider the following precautions to ensure safe and effective use.

• Contraindication: Do not use in patients with known hypersensitivity to any component.
• Bowel obstruction: Avoid if there is a mechanical blockage of the intestine.
• Inflammatory bowel disease: Use with caution in active ulcerative colitis or Crohn’s disease.
• Pregnancy and lactation: Consult a healthcare professional before use, as safety data are limited.
• Pediatric use: Use only under medical supervision for children, dosing may differ.
• Store at room temperature: Keep the enema in its original container, protect from light and moisture.

Microlax can interact with certain medications or substances, influencing their absorption or effect.

Major Interactions (Avoid)

• Antidiarrheal agents (e.g., loperamide): may counteract the laxative effect.
• Oral electrolyte supplements: rectal administration can alter electrolyte balance, requiring monitoring.

Moderate Interactions (Monitor Closely)

• Oral medications with narrow therapeutic index: rapid bowel evacuation may affect absorption timing.
• Intravenous fluids containing electrolytes: concurrent use may affect overall electrolyte status.
• Herbal laxatives or bulk‑forming agents: combined use may increase risk of abdominal discomfort.