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How Long Can A Drug Allergy Reaction Last. The symptoms of drug allergy may happen immediately or after taking the drug for a week or more. Antibodies are proteins created by the immune system to battle foreign invaders such as bacteria and viruses. Symptoms of a drug allergy may start right after you take it. Anaphylaxis is a sudden life-threatening whole-body reaction to a drug or other allergen.
Medications that stay in the body for a few days could cause longe. The symptoms of drug allergy may happen immediately or after taking the drug for a week or more. Healthcare providers cannot know ahead of time if you will have an allergic reaction. It would also depend on whether it was an immediate allergic reaction or one that developed over time. Sulfonamide drug hypersensitivity syndrome. The reaction can start soon after you take the medicine or days or weeks after you stop.
Typically hives due to a medication will last for only a few days.
Symptoms of a drug allergy may start right after you take it. It should probably fade fairly quickly if it was a first time use reaction. 17 years experience Allergy and Immunology Depends. Drug reaction with eosinophilia and systemic symptoms DRESS DRESS is a rare type of drug rash that can be life-threatening. Typically hives due to a medication will last for only a few days. Most people with drug allergy recover very quickly once the medication is stopped although the rash can take 10-14 days to fade.