Magnesia Seid (Magnesium Hydroxide)

Magnesium Hydroxide is used as an antacid and laxative to manage conditions related to excess gastric acidity and reduced bowel motility.

• Heartburn: Provides rapid neutralization of stomach acid to relieve burning sensation.
• Acid indigestion: Reduces discomfort and bloating caused by excess acid in the upper gastrointestinal tract.
• Constipation: Increases intestinal water content, softening stool and facilitating bowel movements.

• Magnesium Hydroxide acts by reacting chemically with hydrochloric acid in the stomach, forming magnesium chloride and water, which raises gastric pH and diminishes acidity. The resulting magnesium ions remain largely unabsorbed in the intestine, where they draw water into the lumen by osmotic action, increasing stool liquidity and promoting peristalsis.

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

Common Side Effects

• Diarrhea: Loose stools occurring shortly after ingestion.
• Abdominal cramping: Mild to moderate stomach discomfort.
• Nausea: Sensation of unease or urge to vomit.
• Flatulence: Increased intestinal gas.

Serious or Rare Side Effects

• Hypermagnesemia: Elevated blood magnesium levels that can affect cardiac and neuromuscular function.
• Severe dehydration: Resulting from excessive fluid loss due to diarrhea.
• Allergic reaction: Rash, itching, swelling, or difficulty breathing indicating hypersensitivity.

When using Magnesium Hydroxide, certain precautions should be observed to minimize risk and ensure safe use.

• Renal function assessment: Evaluate kidney performance before initiating therapy, especially in patients with known renal impairment.
• Electrolyte monitoring: Check serum magnesium and related electrolytes during prolonged use.
• Duration of therapy: Limit use to the shortest period necessary to control symptoms.
• Concomitant antacids: Avoid combining with other antacids or laxatives without medical guidance.
• Pregnancy and lactation: Use only if clearly indicated and prescribed by a healthcare professional.
• Store at room temperature: Keep in the original container, protect from moisture and direct sunlight.

Magnesium Hydroxide can affect the absorption or activity of several medications; awareness of these interactions helps prevent therapeutic failures or toxicity.

Major Interactions (Avoid)

• Tetracycline antibiotics: Magnesium binds and reduces their oral absorption.
• Bisphosphonates: Co‑administration decreases bisphosphonate bioavailability.
• Iron supplements: Magnesium interferes with iron absorption, lowering efficacy.

Moderate Interactions (Monitor Closely)

• Digoxin: Elevated magnesium may enhance digoxin effects, requiring monitoring.
• Calcium channel blockers: Combined use may increase serum magnesium, affecting cardiac conduction.
• ACE inhibitors: Risk of additive hypermagnesemia, especially in renal impairment.