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Jan
How Long Do Drug Allergy Reactions Last. Drug rashes vary in severity from mild redness with tiny bumps over a small area to peeling of the entire skin. They may take a few hours to a few days to disappear. It can take anywhere from a few hours to 10 days. The reaction can start soon after you take the medicine or days or weeks after you stop.
If you have a mild allergic reaction to a drug your doctor may still prescribe it for you. Rashes may appear suddenly within minutes after a person takes a drug or they may be delayed for hours days or even weeks. Most of the time symptoms will appear between 1-2 hours after taking the drug unless you have a more rare delayed type reaction. Swelling angioedema usually lasts 24-72 hours when it reaches maximum. An antibiotic medication allergy is a harmful reaction to an antibiotic. Click to see full answer.
Even with treatment symptoms can last 2 to 4 weeks.
Even with treatment symptoms can last 2 to 4 weeks. You usually dont get a reaction right away. Medications that stay in the body for a few days could cause longe. Some medications leave your system after a few hours and other stick around for a while. An antibiotic medication allergy is a harmful reaction to an antibiotic. Toxic epidermal necrolysis can be life-threatening in up to half the cases.