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A member asked:
How long does it take for an allergic reaction appear?
A doctor has provided 1 answer
Depends: Immedite type reactions can occur i minutes. Contact allergies can take several days to show itself. Some drugs reactions can appears as long as 2 weeks after stopping the antibiotic and can persist for up to 6 months. Some sensitivities will not show at the first exposure, will show only with subsequent exposures.
Answered 2/25/2018
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