Antiviral drugs are medications designed to treat viral infections by inhibiting the development and replication of viruses. Unlike antibiotics, which target bacteria, antiviral drugs specifically focus on viruses, making them essential for managing illnesses like influenza, HIV, and herpes. They work by blocking various stages of the viral life cycle, helping the immune system to control the infection. These drugs can be classified into different categories based on their mechanisms of action. Some antivirals prevent viruses from entering cells, while others interfere with the virus's ability to replicate its genetic material. Overall, antiviral drugs play a crucial role in reducing the severity and duration of viral infections.