Which of the following drugs reduce fever?

Options

A. Tranquilizer
B. Antibiotic
C. Antipyretic
D. Analgesic

Explanation

To determine which of the following drugs reduces fever, we will analyze each option provided:

1. **Tranquilizer**:
- Tranquilizers are primarily used to treat anxiety and depression. They do not have any effect on fever reduction. Therefore, tranquilizers do not reduce fever.

2. **Antibiotic**:
- Antibiotics are medications that fight bacterial infections. They are not designed to reduce fever; rather, they treat the underlying cause of fever if it is due to a bacterial infection. Thus, antibiotics do not directly reduce fever.

3. **Antipyretic**:
- Antipyretics are specifically designed to reduce fever. They work by acting on the hypothalamus in the brain to lower the body's temperature. A common example of an antipyretic is paracetamol (acetaminophen), which is widely used to alleviate fever. Therefore, antipyretics do reduce fever.

4. **Analgesic**:
- Analgesics are drugs that relieve pain. While some analgesics, such as aspirin, can also have antipyretic properties (meaning they can reduce fever), their primary function is to relieve pain. However, they are not classified primarily as fever-reducing agents.

Based on the analysis of each option, the drug that specifically reduces fever is the **antipyretic**.

### Final Answer:
The drug that reduces fever is **Antipyretic**.