Voraxna

Voraxna was a type of poison effective against Cardassians.

In 2373, Dukat had voraxna added to a bottle of kanar, which was then delivered to Tekeny Ghemor.

Benjamin Sisko later confronted Dukat and Weyoun with the poisoned kanar, which according to him was enough to kill a dozen Cardassians. Weyoun drank the kanar and the poison, saying it was "quite toxic". Fortunately for Weyoun, Vorta were immune to most forms of poison. 

Voraxnagift Voraxna