Which of the following compounds is used as an antacid?

The correct answer is Magnesium hydroxide.

Key Points

• Magnesium hydroxide is commonly used as an antacid to neutralize stomach acid and relieve indigestion and heartburn.
• It is often referred to as "milk of magnesia" due to its milky appearance.
• Magnesium hydroxide works by neutralizing hydrochloric acid in the stomach, thereby increasing the pH level and reducing acidity.
• It is also used as a laxative to relieve constipation by drawing water into the intestines and promoting bowel movements.

Additional Information

• Antacids:
  • Antacids are substances that neutralize stomach acidity and are used to relieve heartburn, indigestion, or an upset stomach.
  • Common active ingredients include magnesium hydroxide, aluminum hydroxide, calcium carbonate, and sodium bicarbonate.
  • Antacids provide quick relief from symptoms but do not heal the underlying cause of acid-related conditions.
• Mechanism of Action:
  • Antacids work by neutralizing the excess hydrochloric acid in the stomach, which increases the pH level and reduces acidity.
  • This action provides relief from pain and discomfort caused by acid reflux and indigestion.
• Other Uses of Magnesium Hydroxide:
  • Besides being an antacid, magnesium hydroxide is also used as a laxative to treat constipation.
  • It works by drawing water into the intestines, which helps to soften stools and stimulate bowel movements.
• Safety and Side Effects:
  • Common side effects of magnesium hydroxide include diarrhea, cramping, and an imbalance in electrolytes if used excessively.
  • Patients with kidney disease should use magnesium hydroxide with caution due to the risk of magnesium accumulation.