1.What are the drugs that cause drug allergy? Drugs that cause drug allergies are generally divided into five categories: antipyretics, sulfonamides, sedative and anticonvulsants, antibiotics and serum products. The incidence of drug rash caused by these drugs has been reported inconsistently. Some data show that the ranking of common allergenic drugs: antibiotics in the first place (26.89%), with penicillins in the majority (56.10%). Biological products ranked 2nd (22.30%), and the type of rash caused is mostly urticaria. Antipyretic and analgesic drugs are widely used in clinical practice, ranking 3rd (20.00%). Sulfa drugs caused by drug rash significantly reduced, may be related to the current less clinical application. In addition, chemotherapy drugs and Chinese medicine caused by drug rash is also gradually increasing trend. Other than that, drug rash can occur with any drug. 2, what are the clinical types of drug allergy Because of the wide variety of drugs, there are many types of drug allergy, and their clinical manifestations are diverse. The classification of drug rash can be divided into mild drug rash and severe drug rash. Mild drug rashes include: fixed drug rash, measles drug rash, scarlet fever drug rash, and erythema multiforme drug rash. Severe drug rashes include: erythrodermic drug rash, acute generalized eruptive pustulosis, severe erythema multiforme drug rash, and toxic epidermal necrolysis loosening drug rash. The incubation period varies with the type of allergenic drug. The incubation period of cephalosporins, penicillins, quinolones, antipyretics and sulfonamides is short, generally occurring within 2 weeks. The incubation period of carbamazepine, allopurinol, phenobarbital and phenytoin sodium drugs is relatively long, generally occurring after 3-4 weeks of medication. 3. Is it possible to have drug rash without a history of taking medication? This is the case. We often encounter typical drug rashes in outpatient clinics, but the patient denies taking any medications. Since the food we eat, such as milk and meat, may contain trace amounts of medication, it is possible for some sensitive individuals to have a drug allergic reaction after eating food containing medication. 4. Can I still take drugs after I have been cured of my allergy? If you are allergic to a certain drug or class of drugs, even if you are cured, you should not take it in the future. Moreover, the name of the drug should be written on the first page of your medical record book, and you should also inform your doctor and nurse in time to avoid applying similar drugs when you are hospitalized due to illness. 5. Is there a life threatening drug allergy? Mild drug rash is not life-threatening, but severe drug rash, especially severe erythema multiforme drug rash and toxic epidermal necrolysis relaxation drug rash, has a high mortality rate. If the condition is not controlled in time, death is often due to infectious shock and electrolyte disorders. Therefore, if you find a suspected drug rash, you should seek medical attention as soon as possible, and for severe drug rashes, time is of the essence. 6. Is there a test for drug allergy? At present, only a few drugs can be tested by blood sampling for possible allergy, but most drugs cannot be tested. When a drug reaction occurs, the diagnosis can only be made based on clinical manifestations and the history of medication taken. In many cases, patients take multiple drugs when they have a drug reaction, and it is difficult for doctors to determine which drug they have an allergic reaction to. In such cases, all medications can only be stopped. However, in many cases, the patient cannot stop all medications. In this case, the only way is to stop the medication and then gradually increase the number of medications. Start with the drug that is least likely to cause allergic reaction and take it for 3 days without any reaction, and then take another drug. 7.What are the main things for patients with drug allergy? If you are allergic to a certain drug, you may also be allergic to other drugs of the same type, so you should consult with your doctor before taking the drug. At the same time, you should keep a diary and record the time and type of medication you take in time so that you can have a record of it later.