Why are cimetidine and ranitidine better antacids than sodium hydrogencarbonate or magnesium or aluminium hydroxide ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Problem**: The question asks why cimetidine and ranitidine are considered better antacids compared to sodium hydrogen carbonate, magnesium hydroxide, or aluminum hydroxide.

2. **Role of Antacids**: Antacids are substances that neutralize stomach acid. They are used to relieve symptoms of heartburn, indigestion, and upset stomach caused by excess hydrochloric acid (HCl) in the stomach.

3. **Temporary Relief vs. Long-term Solution**: Sodium hydrogen carbonate (baking soda), magnesium hydroxide, and aluminum hydroxide provide temporary relief by neutralizing the acid. However, they do not address the underlying cause of acid overproduction.

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