Drug allergies can manifest themselves in many ways, from mild skin redness and itching to severe asthma, purpura, anaphylaxis, and even life-threatening conditions. There are some drug allergies that can get better after stopping the medication. But there are times when just stopping the medication is not enough. In case of drug allergy, the patient should first drink more warm water to facilitate the excretion of the drug as soon as possible, and keep an eye on the changes in the body. If more severe allergy symptoms occur, it may be necessary to take necessary first aid measures, such as taking antihistamine, vasoconstrictor drugs, or corticosteroid injections. It is best to go to the hospital as soon as allergies appear to avoid worsening the situation.