Some people cold after taking cold medicine, and there is no response after the first secondary taking, while taking the body but after many played a lot of rash with blisters, the doctor said drug allergy -induced. Why is this?
Drug allergy usually occurs after repeated use of the same drug, and rarely occurs in first-time users. Moreover, drug allergies are mostly acquired, the allergenicity of obtaining that comes before the occurrence of a drug allergy many contacts. When allergens drug allergy drug, repeated exposure to a drug (antigen), the body will produce antibodies to be re-exposure to the same drug (same antigen), the body will produce an immune response, commonly known as allergy attack.
However, some patients for the first time after the occurrence of a certain drug allergies, and even anaphylactic shock. In fact, these patients prior to use of drugs already been in contact with the drug. For example, the first time that an allergic reaction to penicillin who may have previously been injected cows drinking milk penicillin, penicillin injected into contact with the patient's respiratory droplets, urine, or used outside of penicillin. In addition, a large number of flying in the air everywhere penicillin fungus spores, on rotten oranges tend to contain a lot of bacteria to penicillin, either consumption or exposure are likely to become allergic to penicillin conditions.
Thus, in considering suspect drug allergy allergen, the commonly used drugs in the past should not be excluded, once determined for certain drug allergies, should prevent re-exposure. In addition, the medicine will make allergies, the light appears only a wide range of skin rash, often accompanied with itching; weight may fever, dizziness, headache, irritability, or laryngeal edema, asthma, vomiting, diarrhea , as well as the occurrence of exfoliation dermatitis .
