Ouabain

Ouabain (from Somali waabaayo, “arrow poison” through French ouabaïo) also known as g-strophanthin, is a plant derived toxic substance that was traditionally used as an arrow poison in eastern Africa for both hunting and warfare. Ouabain is a cardiac glycoside and in lower doses, can be used medically to treat hypotension and some arrhythmias. It acts by inhibiting the Na/K-ATPase, also known as the sodium-potassium ion pump.

Ouabain can be found in the roots, stems, leaves, and seeds of the Acokanthera schimperi and Strophanthus gratus plants, both of which are native to eastern Africa.

Characters poisoned with ouabain

 * Valentine Chantry - Triangle at Rhodes
 * Louise Laxton - The Case of the Caretaker