CH. 40 focuses on antiviral drugs, explaining how they work against various viral infections. It details the characteristics and replication processes of viruses, including HIV, herpesviruses (HSV, VZV, CMV), hepatitis, and influenza viruses. The source describes different classes of antiviral medications, their mechanisms of action, indications, contraindications, and potential adverse effects, highlighting the importance of the immune system in fighting off infections and the challenges of treating immunocompromised individuals and specific viruses like HIV and Hepatitis C. Finally, it offers insights into the nursing process for patients receiving these medications, including assessment, implementation, and evaluation.