Echinocandins are a class of antifungal medications primarily used to treat infections caused by Candida and Aspergillus species. They work by inhibiting the synthesis of beta-(1,3)-D-glucan, an essential component of the fungal cell wall, leading to cell lysis and death. These drugs are often administered intravenously and are typically reserved for patients with severe or resistant fungal infections. Common examples of echinocandins include caspofungin, micafungin, and anidulafungin. They are generally well-tolerated, with fewer side effects compared to other antifungal treatments.