Which of the following is a common antibiotic?

Tetracycline is a common antibiotic that is part of the tetracycline class of medications. It is widely used to treat a variety of bacterial infections due to its broad-spectrum activity against many gram-positive and gram-negative bacteria. Tetracycline works by inhibiting protein synthesis in bacteria, which ultimately prevents their growth and replication.

The other options listed are not antibiotics. Meperidine is an opioid analgesic used primarily for pain management. Hydrochlorothiazide is a thiazide diuretic used to treat hypertension and edema. Lidocaine is a local anesthetic commonly used for pain relief during medical procedures. Understanding the classification and function of these medications highlights the importance of identifying which drugs are specifically designed to combat infections.