How long does the Herxheimer effect last?
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4 min read
According to StatPearls, a Jarisch-Herxheimer reaction (JHR) during syphilis treatment typically resolves within 24 hours. However, for other conditions like Lyme disease or fungal overgrowth, the question of how long does the Herxheimer effect last can have a much more varied answer, with reactions sometimes continuing for days, weeks, or even recurring cyclically.