Commonly called bishop’s weed, is both a vasodilator (dilates blood vessels), and a bronchial dilator. It accomplishes both without caffeine-like or other stimulation affecting the adrenal glands. The dried, ripe fruit is used to make medicine. People commonly prepare an “extract” by removing khellin, one of the active chemicals in khella, and dissolving it in a liquid that is then used as medicine. Khella is less commonly prepared as a tea. Khella is used for respiratory conditions including asthma, bronchitis, cough, and whooping cough.