herx

Etymology
Shortened from, which in turn derives from the names of and , physicians who separately described the reaction in syphilis patients.

Verb

 * 1)  To experience a Jarisch-Herxheimer reaction, a negative reaction to antibiotic treatment.

Noun

 * 1)  A Jarisch-Herxheimer reaction.

Usage notes

 * The informal terms herx and are common in discussions of Lyme disease, especially among patients of the disease and their supporters.