Dithymoquinone is a bioactive isolate of "Nigella sativa". Preparations of "Nigella sativa" are a good method to control ticks. Nigellicine was isolated from the widely distributed plant "Nigella sativa" L. (black cumin). In Yemen, "ka'ak" was traditionally made with a sparse additive of black cumin ("Nigella sativa"). Thymoquinone is a phytochemical compound found in the plant "Nigella sativa". Black seed ("Nigella sativa") has shown anti-inflammatory effect due to its high thymoquinone content.