Polymyxin Injection for Flat Warts side effects include transient low-grade fever, vomiting, loss of appetite, nausea, or allergic reactions such as rash, hives, itching, and difficulty breathing. Polymyxin is usually composed of multimolecular nucleotides, which can promote the formation of antibodies and stimulate phagocytosis, and is mostly used in antiviral therapy. After polymyxin injection, some patients may experience gastrointestinal discomfort manifested as nausea, vomiting, loss of appetite and other adverse reactions. A few patients may have mild fever and elevated body temperature. Allergic reactions such as rash, urticaria, pruritus, dyspnea, pallor, and loss of consciousness may also occur. It is contraindicated for those who are allergic to the product and the ingredients contained in it, and for pregnant women. Patients should go to the hospital in time if they experience any significant side effects when using Polymyxin Injection for flat warts.