Symptoms of an allergy can be readily reduced by the use of all , except

Options

A. histamine
B. cortisol
C. adrenaline
D. anti-histamine

Answer

To solve the question regarding which substance does not help in reducing allergy symptoms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Allergy**:
- An allergy is an exaggerated response of the immune system to certain substances known as allergens. Common allergens include pollen, dust, and pet dander.

2. **Identifying Symptoms**:
- Symptoms of allergies can include sneezing, watery eyes, a runny nose, and difficulty in breathing. These symptoms are often caused by the release of chemicals in the body.

3. **Role of Histamine**:
- Histamine is a chemical released by mast cells during an allergic reaction. It is responsible for many of the symptoms associated with allergies, such as itching and swelling.

4. **Medications for Allergy Relief**:
- To alleviate allergy symptoms, various medications are used:
- **Antihistamines**: These block the action of histamine and help reduce symptoms.
- **Cortisol (Steroids)**: These can help reduce inflammation and immune response.
- **Adrenaline**: This can be used in severe allergic reactions (anaphylaxis) to quickly counteract symptoms.

5. **Analyzing the Options**:
- The question asks which of the following does not help reduce allergy symptoms:
- **Histamine**: This is the chemical that causes allergy symptoms, so it does not help in reducing them.
- **Cortisol**: Helps reduce symptoms.
- **Adrenaline**: Helps reduce symptoms.
- **Antihistamines**: Help reduce symptoms.

6. **Conclusion**:
- The correct answer is **Histamine**, as it is responsible for causing allergy symptoms rather than alleviating them.

### Final Answer:
- **Histamine** is the substance that does not help in reducing allergy symptoms.