Doa’a Anwar Ibrahim* Department of Pharmacology, University of Science and Technology, Sana’a, Yemen Abstract Plants had been used for medicinal purposes long before recorded history. The seeds of Nigella sativa Linn. (Ranunculaceae), commonly known as black seed or black cumin, are used in folk (herbal) medicine all over the world for the treatment and prevention of a number of diseases.Black ... Read More »