Question

The antacids that have rapid onset of action?

• A. Magnesium containing antacid
• B. Aluminium containing antacid
• C. Sodium containing antacids

Hint:

Sodium Bicarbonate = Fastest acting but shortest duration.

Answer 1

The Correct Option is C

Step 1: Concept
Antacids vary in their onset and duration of action based on their solubility and chemical reactivity with gastric hydrochloric acid.

Step 2: Meaning
Rapid onset refers to how quickly the substance begins to neutralize the stomach acid after ingestion.

Step 3: Analysis
Sodium bicarbonate is highly water-soluble and reacts almost instantaneously with HCl to neutralize it. Magnesium and Calcium compounds react moderately fast, while Aluminium compounds are the slowest.

Step 4: Conclusion
Due to high solubility and immediate chemical reaction, sodium-containing antacids provide the fastest relief.

Final Answer: (C)