Amongst the following antihistamines, which are antacids?

Options

A. Ranitidine
B. Brompheniramine
C. Terfenadine
D. Cimetidine

Answer

To determine which of the antihistamines listed are also classified as antacids, we will analyze each of the given options based on their functions and properties.

### Step-by-Step Solution:

1. **Identify the Antihistamines:**
- The question lists several antihistamines. We will focus on the mentioned drugs: Ranitidine, Brompheniramine, and Simetidine.

2. **Understand Ranitidine:**
- Ranitidine is classified as a histamine H2 receptor antagonist. It works by reducing the amount of acid produced in the stomach.
- **Conclusion:** Ranitidine is an antacid.

3. **Understand Brompheniramine:**
- Brompheniramine is an antihistamine that primarily reduces the effects of histamine in the body, which helps alleviate allergy symptoms.
- **Conclusion:** Brompheniramine is not an antacid.

4. **Understand Simetidine:**
- Simetidine is also a histamine H2 receptor antagonist and is used to treat conditions like heartburn and acid indigestion, similar to Ranitidine.
- **Conclusion:** Simetidine is an antacid.

5. **Final Conclusion:**
- Among the listed antihistamines, Ranitidine and Simetidine are classified as antacids.

### Answer:
The antihistamines that are also antacids are **Ranitidine and Simetidine**.

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