vomica

It had a dose of nux vomica strong enough to kill a horse.

Other products included belladonna and nux vomica, which contains strychnine — a well-known poison used to kill rodents.

She carefully squeezed a few drops of clear liquid into the glass, a tincture of nux vomica.

I lingered over a case of vintage pharmaceuticals that included a vial of something called nux vomica and another labeled “endocroids.”

Strychnine, made from the seeds of the south-east Asian Nux vomica tree, was equally fashionable, as – in the Middle Ages – was atropine, aka belladonna or deadly nightshade: the juice of a few berries could be lethal.