Unlike the textbook JHR, which often lasts only 24 hours 1, Herx-like symptoms related to the treatment of gut dysbiosis or chronic low-grade bacterial, parasitic, or fungal infections may: Appear several days into treatment Last several days or even weeks Recur periodically, when treating infections that cycle between dormant and active phases This broader, experience-based perspective recognizes that not all Herx reactions follow the same predictable pattern, and many are milder but longer-lasting, especially when associated with gut pathogens
[DOI] [PMC free article] [PubMed] [Google Scholar] 173.Chen C.C., Luo J.C., Fang Y.J., Lee J.Y., Kuo C.C., Yang T.H., Chiu M.C., Yu J.J., Bair M.J., Chen P.Y., et al
John Myers, was a simple intravenous injection administered via a 10-ml syringe, containing B1, B6, B complex, calcium, magnesium, vitamin C, and dilute hydrochloric acid
10.1038/s43247-025-02169-5 193 HsiaoC
Repeated overdoses can also occur with self-harm intent (often termed staggered overdoses), and similarly carry an increased risk of hepatotoxicity when compared to acute self-harm overdoses *
(2021c)