GERD Explained: Pathophysiology, Drug Management, and Treatment Strategy

🧠 GERD: Pathophysiology and Clinical Insights

Definition: GERD is a chronic condition where stomach contents, primarily acid, reflux into the esophagus due to a failure of the lower esophageal sphincter (LES), causing mucosal damage and symptoms such as heartburn and regurgitation.

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🔬 Pathophysiology

• LES Dysfunction: Transient or persistent LES relaxation is the core mechanism, often exacerbated by:
  • High intra-abdominal pressure (e.g., obesity, pregnancy)
  • Hormonal effects (progesterone in pregnancy)
  • Nicotine, alcohol, caffeine → reduce LES tone
• Impaired Esophageal Clearance: Decreased peristalsis delays acid clearance.
• Delayed Gastric Emptying: Prolongs gastric distension → reflux risk.
• Hiatal Hernia: Weakens diaphragmatic support for the LES.

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🧾 Drug Management in GERD

1. SOCID/LOKIT (Omeprazole 20 mg)

Class: Proton Pump Inhibitor (PPI)Mechanism: Irreversibly inhibits H+/K+ ATPase in gastric parietal cells, reducing acid secretion.

Indication: Moderate-to-severe GERD, erosive esophagitis, PPI trial for diagnostic/therapeutic purposes.

Dose:

• Omeprazole 20 mg, 1×1 oral, before meals (ac), usually in the morning.
• Duration: 4–8 weeks for initial healing; may continue for maintenance if symptoms recur.

Rationale: Gold standard for acid suppression; promotes mucosal healing.

2. BELCID (Aluminum hydroxide + Magnesium hydroxide – liquid antacid)

Class: AntacidMechanism: Neutralizes existing gastric acid, providing quick symptom relief.

Indication: Breakthrough symptoms despite PPI or intermittent mild GERD.

Dose:

• 15–30 mL 1× prn, after meals and at bedtime, or during heartburn.

Caution:

• Avoid in renal failure (especially magnesium-containing).
• Not for long-term use due to rebound acid hypersecretion.

3. DOMPERIDONE-M (Domperidone 10 mg)

Class: Dopamine D2 receptor antagonist (prokinetic)

Mechanism: Increases LES tone and enhances gastric emptying by inhibiting dopamine receptors in the GI tract without crossing the blood-brain barrier.

Indication: GERD with associated postprandial fullness, early satiety, or nausea due to delayed gastric emptying.

Dose:

• 10 mg 1× before meals, usually 3 times a day (tid).

Caution: QT prolongation risk, especially with prolonged use or in elderly.

4. AIR-X TABLET

Generic: Simethicone (often combined with other agents)Class: Anti-foaming agentMechanism: Reduces surface tension of gas bubbles in GI tract → gas coalesces and is passed more easily.

Indication: Bloating, gas-related discomfort accompanying GERD.

Dose:

• 40–80 mg orally tid, after meals and before bedtime.

5. DE GAS (Simethicone 80 mg)

Same as AIR-X, but likely a higher-dose formulation for symptomatic gas relief.Dose:

• 80 mg 1× after meals, prn.

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🎯 Combined Therapeutic Strategy

• First-line: PPI (Omeprazole 20 mg) once daily before breakfast.
• Add-ons:
  • Domperidone if there's gastric dysmotility or persistent postprandial fullness.
  • Antacids (Belcid) prn for rapid relief.
  • Simethicone (De Gas / Air-X) for bloating/gas.

⚠️ Lifestyle and Non-pharmacologic Measures (Always co-prescribed)

• Weight loss (especially if BMI >25)
• Avoid late-night meals
• Elevate head of bed
• Avoid trigger foods: caffeine, chocolate, spicy food, alcohol
• Smoking cessation

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🔍 Follow-Up

• If no improvement after 8 weeks of PPI:
  • Consider EGD (esophagogastroduodenoscopy) to rule out:
    • Erosive esophagitis
    • Barrett's esophagus
    • Other structural lesions