Drug allergies mainly manifest as skin itching, red rash, and papules; severe cases may experience ulceration, exfoliative dermatitis, in the respiratory system it may present as nasal congestion, breathing difficulties, and laryngeal edema; in the digestive system, patients may experience abdominal pain and diarrhea, sometimes accompanied by joint pain and swelling, immune dysfunction, and the occurrence of allergic purpura. Some drug allergies can cause neurological reactions, such as dizziness and headaches. When a drug allergy occurs, immediately stop using the suspected medication, and simultaneously take anti-allergy medications such as loratadine, cetirizine, or administer diphenhydramine via muscular injection. Oral intake of compound glycyrrhizin capsules may be considered. If there is laryngeal edema, it is crucial to seek prompt medical attention at a hospital, actively manage the allergy, and severe cases may require a tracheotomy for rescue. (Specific medication usage should be conducted under the guidance of a doctor, and medications should not be used without authorization.)