Amongst the following compounds, which one is an antacid ?

Options

A. Ranitidine
B. Broinpheniramine
C. Terfenadine
D. Meprobamate

Answer

To determine which of the given compounds is an antacid, let's analyze each option provided:

1. **Rantidine**: This compound is known to be an H2 receptor antagonist, which reduces stomach acid production. While it is commonly used to treat conditions like peptic ulcers and gastroesophageal reflux disease (GERD), it is not classified as a traditional antacid. However, it does help in managing acidity.

2. **Bromfeniramine**: This compound is an antihistamine used primarily for the relief of allergy symptoms. It does not have antacid properties.

3. **Terfenadine**: Similar to Bromfeniramine, Terfenadine is also an antihistamine. It is used to treat allergic conditions and does not function as an antacid.

4. **Mipromate**: This compound is classified as a tranquilizer and is not related to antacid properties.

After evaluating all the options, we find that **Rantidine** is the closest to being associated with antacid properties, although it is primarily an H2 antagonist rather than a traditional antacid.

### Step-by-Step Solution:
1. **Identify the Compounds**: List out the compounds provided in the question: Rantidine, Bromfeniramine, Terfenadine, and Mipromate.

2. **Research Each Compound**:
- Rantidine: Known for reducing stomach acid.
- Bromfeniramine: Antihistamine for allergies.
- Terfenadine: Antihistamine for allergies.
- Mipromate: Tranquilizer.

3. **Classify the Compounds**: Determine the class of each compound.
- Rantidine: H2 receptor antagonist.
- Bromfeniramine: Antihistamine.
- Terfenadine: Antihistamine.
- Mipromate: Tranquilizer.

4. **Determine the Antacid**: Identify which compound is used to neutralize stomach acid.
- Rantidine is the only compound that affects stomach acidity, though it is not a classic antacid.

5. **Conclusion**: The compound that is closest to being an antacid is **Rantidine**.