What is the role of histamine in inflammatory response ? Name few drugs which reduce symptoms of allergy?

Explanation

### Step-by-Step Solution:

**Step 1: Understanding Histamine and Its Role in Inflammatory Response**
- Histamine is a biogenic amine that is produced by mast cells and basophils in response to injury or allergic reactions.
- During an inflammatory response, histamine is released into the surrounding tissues, leading to several physiological changes.
- It causes vasodilation, which increases blood flow to the affected area, resulting in redness and warmth.
- Histamine also increases the permeability of blood vessels, allowing fluid and immune cells to enter the tissues, leading to swelling (edema).
- Additionally, histamine stimulates nerve endings, causing itching and pain.
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