i wonder if it is the same scenario as buhner talks about
with astragalus and chronic lyme
astragalus is another herb that increases TH1 and reduces TH2 activity ( Note - oximatrine is actually a herbal extract too) - and buhner says that in Chronic Lyme Astragalus can ( not for everyone - but in general ) worsen symptoms because Lyme, once chronic causes increased TH1 reactions.
i have recently trialled Astragalus with mixed results - see my posts on that in the last week
a great resource here on the use of Oximatrine in ME/CFS - and non-cytolytic viruses for which i believe it is a treatment - and the work of John Chai https://me-pedia.org/wiki/oxymatrine