What is the primary use of antifungal medications?

Antifungal medications are specifically designed to target and eliminate fungal and yeast infections, making them effective in treating conditions caused by these pathogens. These infections can range from superficial skin infections, such as athlete's foot and ringworm, to more severe systemic infections that can pose significant health risks.

Antifungals work by inhibiting the growth of fungi, disrupting their cell membranes, or interfering with their metabolic processes, thus providing a targeted approach to managing fungal infections. This makes them an essential and appropriate choice for conditions such as candidiasis (common yeast infections) and other fungal diseases.

The other options presented reflect uses of medications that do not align with the specific purpose of antifungals. Antibiotics would typically address bacterial infections, antiemetics are used to prevent nausea, and nitrates or other heart medications would alleviate angina pain. Thus, the correct response highlights the unique function of antifungal medications in treating infections caused by fungi and yeast.