Despite its toxicity, the tansy has been used as a medicinal herb for centuries. A bitter infusion of tansy flowers has been used to treat parasitic worm infestations. Though formerly used as a flavoring in puddings and omelettes, such practice has become relatively obscure. Its taste has been met with mixed reviews; some find a tansy toxicity while others describe a fruity, tangy breath of minty cool air. Whiskey magnate Jack Daniel has also famously enjoyed drinking his own whiskey with sugar and crushed tansy leaf.