Which of the following can be used as an antacid ?

Options

A. Ranitidine
B. Histamine
C. Equanil
D. Aspirin

Answer

To determine which of the following can be used as an antacid, we need to understand what an antacid is and how it functions in the body.

### Step-by-Step Solution:

1. **Understanding Antacids**:
- Antacids are substances that neutralize stomach acidity. They are typically basic compounds that help to increase the pH level in the stomach, reducing acidity.

2. **Function of Antacids**:
- Antacids work by neutralizing excess hydrochloric acid (HCl) in the stomach. This helps alleviate symptoms of heartburn, indigestion, and ulcers.

3. **Identifying Common Antacids**:
- Common antacids include compounds like magnesium hydroxide, aluminum hydroxide, calcium carbonate, and ranitidine. Ranitidine, specifically, is known as a proton pump inhibitor that reduces the production of stomach acid.

4. **Analyzing the Options**:
- If the question provides multiple options, we need to evaluate each one to see if it fits the definition of an antacid:
- **Ranitidine**: A proton pump inhibitor that decreases H+ concentration and is used to treat acidity. **(This is an antacid)**
- **Histamine**: A compound involved in allergic reactions, not an antacid. **(Not an antacid)**
- **Equanine**: A tranquilizer that acts on the central nervous system, not related to acidity. **(Not an antacid)**
- **Aspirin**: An analgesic used for pain relief, not an antacid. **(Not an antacid)**

5. **Conclusion**:
- Based on the analysis, the only option that can be classified as an antacid is **Ranitidine**.

### Final Answer:
- The correct answer is **Ranitidine**.