herxed

Verb

herx (third-person singular simple present herxes, present participle herxing, simple past and past participle herxed)

1. (informal) To experience a Jarisch-Herxheimer reaction, a negative reaction to antibiotic treatment.
   • These usually last for several hours, and require little more than aspirin and bed rest. Yet many Lyme newsgroup participants write about a "herx" beginning days or weeks after the start of antibiotic therapy, and "herxing" for weeks at a time -- often in a cyclic fashion.2017 October 1, Edward McSweegan, “Lyme Disease: Questionable Diagnosis and Treatment”, in ActionLyme.org, archived from the original on 03 Apr 2023

See all 2 meanings of herx