Transfer factor oral solution is an immunomodulator and belongs to a prescription drug, which is sometimes used for the treatment of bacterial and viral infections, such as herpes zoster and Candida albicans infection, and also for the adjuvant treatment of malignant tumors and other diseases, and occasionally for some immunodeficiency diseases. Drug trials and clinical data show that the drug basically does not cause any harm, but do not exclude a small number of patients with allergic reactions, gastrointestinal reactions, systemic reactions, etc.: 1. Allergic reactions: patients taking transfer factor oral solution may experience allergic reactions, patients may experience local or systemic itching, papules, rashes, hives and other symptoms; 2. Gastrointestinal reactions: some patients taking 2. Gastrointestinal reactions: some patients taking Transfer Factor Oral Solution may experience nausea, regurgitation, vomiting and other gastrointestinal symptoms, but the symptoms are usually mild and can disappear after stopping the drug; 3. Patients who take this drug for a long time may have swollen hands and feet and swollen eyelids. When taking Transfer Factor Oral Solution, if you need to take other drugs at the same time, you should consult your doctor first to avoid adverse reactions from drug interactions. Patients should stop the drug immediately after the occurrence of the above-mentioned adverse drug reactions, seek medical attention promptly and take further treatment actively.