Anti-allergy drugs are called

Options

A. Antimicrobials
B. Antihistamines
C. Antivirals
D. Antifungals

Answer

### Step-by-Step Solution:

1. **Understanding Allergies**:
- Allergies occur when the immune system reacts to a substance (allergen) as if it were a threat. This reaction often leads to the release of certain chemicals in the body.

2. **Role of Histamines**:
- One of the key chemicals released during an allergic reaction is histamine. Histamines are responsible for many allergy symptoms, including itching, swelling, and redness.

3. **Anti-allergy Drugs**:
- To alleviate allergy symptoms, medications are used that counteract the effects of histamines. These medications are known as **antihistamines**.

4. **Function of Antihistamines**:
- Antihistamines work by blocking the action of histamines at their receptor sites, thereby reducing or preventing the symptoms associated with allergies.

5. **Examples of Antihistamines**:
- Some common antihistamines include Claritin, Zyrtec, and Benadryl. These drugs are effective in treating symptoms such as itching, inflammation, and common cold-like symptoms.

6. **Conclusion**:
- Therefore, anti-allergy drugs are commonly referred to as **antihistamines**.