Name some common antibiotics.

Explanation

**Step-by-Step Solution:**

1. **Understanding Antibiotics**: Antibiotics are chemical substances that are used to fight against bacteria. They can either kill bacteria (bactericidal) or inhibit their growth (bacteriostatic).

2. **Identifying Common Antibiotics**: Some of the most commonly used antibiotics include:
- **Penicillin**: One of the first antibiotics discovered and widely used to treat various bacterial infections.
- **Ampicillin**: A type of penicillin that is effective against a broader range of bacteria.
- **Ciprofloxacin**: A fluoroquinolone antibiotic that is effective against a variety of bacterial infections.
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