Antiviral drugs are a group of drugs used to treat viral infections. These drugs work by blocking the body's ability to reproduce and spread viruses. This effect can help reduce the severity and duration of symptoms caused by the virus and also prevent the infection from spreading to others.

Some examples of antiviral drugs include: acyclovir for herpes, seltamivir for flu, and ribavirin for hepatitis C. When taking an antiviral medication, it is important to follow the instructions given by your doctor or pharmacist or written on the medication label to ensure safe and effective use.