What is the primary purpose of a medication with the suffix "-cillin"?

• A. Antihypertensive
• B. Antidiabetic
• C. Antibiotic
• D. Antidepressant

Answer: (C)

Medications with the suffix "-cillin" primarily serve as antibiotics. This suffix is associated with a specific class of antibiotics known as penicillins, which are derived from the mold Penicillium. These antibiotics work by interfering with the synthesis of bacterial cell walls, ultimately leading to the death of bacteria. They are commonly used to treat a range of infections caused by susceptible bacteria, including respiratory infections, urinary tract infections, and skin infections.

Understanding that "-cillin" indicates an antibiotic is crucial, particularly in recognizing the role of these medications in combating bacterial infections effectively. In contrast, medications categorized as antihypertensives, antidiabetics, or antidepressants serve different therapeutic purposes and belong to entirely different classes with distinct mechanisms of action and indications.