Which of the following is NOT a type of performance-enhancing drug?

Antibiotics are primarily used to treat bacterial infections and do not enhance physical performance. They function by inhibiting the growth of or destroying bacteria, leading to recovery from infections. While they play a critical role in managing illness and ensuring overall health, they do not provide any direct benefits in enhancing athletic performance, strength, or endurance.

In contrast, anabolic steroids, stimulants, and narcotics can all have performance-enhancing effects. Anabolic steroids promote muscle growth and strength, stimulants can increase energy and focus during competitions, and narcotics may be misused for pain relief to allow athletes to continue competing despite injuries. Understanding the different categories of substances and their effects is crucial in the realm of sports medicine and ethics in sports competition.