Antiviral agents are commonly used to give production of viruses that cause disease. It is very difficult to find medicines of the host cell. In any case, a few enzymes are just present in infections and these are potential focuses for antiviral Drugs. Agents that inhibit the transcription of the viral genome are DNA polymerase inhibitors and reverse transcriptase inhibitors. Protease inhibitors inhibit post-translational events. Other antiviral operators restrain the infection from appending to or infiltrating the host cell. Immunomodulators incite generation of host cell enzymes, which stop viral multiplication. Integrase strand move inhibitors anticipate a mix of the viral DNA into the host DNA by repressing the viral enzyme integrase. Neuraminidase inhibitors block viral enzymes and inhibit reproduction of the viruses.