Which of the following medications is used to treat infections caused by bacteria?

The correct answer, which is the antibiotic, is used specifically to treat infections caused by bacteria. Antibiotics function by either killing bacteria or inhibiting their growth, making them effective in managing bacterial infections such as pneumonia, strep throat, and urinary tract infections. They are not effective against viral infections, which is an important distinction in treatment.

The other options relate to different types of medications. Antifungal medications are used to treat fungal infections, such as those caused by yeast or mold. Antipyretics are drugs that reduce fever and do not target infections directly; they are often used to alleviate symptoms associated with infections. An antidote is used to counteract the effects of poisons or overdoses, not to treat infections. Understanding the specific roles of these medications is crucial in the field of emergency care and appropriate treatment protocols.