Do medications for influenza A and B have side effects?

Antiviral medications for influenza A and B may indeed cause certain side effects during treatment. For influenza A drugs, common side effects include nausea, decreased appetite, and fatigue, which may result from the drug's irritation of the gastric mucosa. Additionally, some patients may experience gastrointestinal discomfort such as diarrhea or bloating. In more severe cases, these medications could trigger allergic reactions or abnormalities in liver and kidney function. Influenza B medications may also produce side effects; for example, throat irritation leading to coughing, typically caused by the drug's stimulation of the pharyngeal mucosa as it passes through the gastrointestinal tract. Moreover, patients allergic to certain components of the medication may develop allergic reactions such as rashes or skin itching.