Hunting for interesting herb teas, I bought us a smidgen of hyssop. Nice smell, so WTH, my sweetie has been suffering from a narsty head/chest cold. Before brewing and drinking any, of course, I looked it up. Nothing definite yet; not studied much. However, there’s a limited finding in rats (well, they’re my relatives, we’re just not real close) of convulsant effect, as in tonic-clonic spasms. Given this, I’d far rather eschew it than drink it or otherwise ingest it orally. I did subject my wife to some of the steam, which apparently did no harm, and might have been of some placebic benefit. FYI.