Antihistamine relieves

Options

A. Nephritis
B. Allergy
C. Stroke
D. Angina pectoris

Answer

### Step-by-Step Solution:

1. **Understanding Antihistamines**: Antihistamines are medications that counteract the effects of histamine, a chemical released during allergic reactions.

2. **Identifying the Role of Histamine**: Histamine is released by the immune system in response to allergens. It plays a key role in allergic reactions, causing symptoms such as sneezing, runny nose, watery eyes, and difficulty in breathing.

3. **Recognizing Allergic Reactions**: Allergic reactions occur when the immune system overreacts to allergens (substances that trigger allergies). This exaggerated immune response leads to the release of histamine and other chemicals from mast cells.

4. **Symptoms of Allergies**: Common symptoms of allergies include sneezing, runny nose, watery eyes, and breathing difficulties, all of which are caused by the action of histamine.

5. **Function of Antihistamines**: Antihistamines work by blocking the action of histamine, thereby alleviating the symptoms associated with allergic reactions. They provide immediate relief from the discomfort caused by these symptoms.

6. **Conclusion**: Therefore, antihistamines are primarily used to relieve symptoms of allergies.

### Final Answer:
Antihistamines relieve symptoms of allergies.

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