Which of the following are not used as antacids ?

Options

A. Magnesium trisilicate
B. Sodium bicarbonate
C. Magnesium sulphate
D. Benadryl

Answer

To determine which of the following substances are not used as antacids, we will analyze each option provided: Magnesium Trisilicate, Sodium Bicarbonate, Magnesium Sulfate, and Benadryl.

### Step-by-Step Solution:

1. **Understanding Antacids**:
- Antacids are substances that neutralize stomach acidity. They are typically basic compounds that help relieve symptoms of heartburn, indigestion, and upset stomach.

2. **Analyzing Each Option**:
- **Magnesium Trisilicate**:
- This is commonly used as an antacid. It helps relieve stomach pain due to indigestion or heartburn. Therefore, it is **not** the answer.

- **Sodium Bicarbonate**:
- Also known as baking soda, sodium bicarbonate is used as an antacid. It neutralizes stomach acid and relieves acid indigestion. Thus, it is **not** the answer.

- **Magnesium Sulfate**:
- This compound (MgSO4) is primarily used to control low blood levels and is not used as an antacid. Therefore, this is a candidate for the answer.

- **Benadryl**:
- Benadryl is an antihistamine used to treat allergies, not an antacid. Therefore, this is also a candidate for the answer.

3. **Conclusion**:
- The substances that are **not** used as antacids are **Magnesium Sulfate** and **Benadryl**.

### Final Answer:
**Magnesium Sulfate and Benadryl are not used as antacids.**

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