Greece is called Unan in Persian and Graeco-Arabic medicine that is thought to have originated with Claudius Galenus of Pergamum is called Unani. Another ancient stalwart of Unani is Hakim Ibn Sina, known to the west as Avicenna. As a medical system, Unani has taken firm roots in the Indian subcontinent. Unani practice is approved by the Indian government. Many treatments and remedies in Unani resemble those of Ayurveda; both streams of medicine make use of herbal medicines and stress the importance of fire, water, earth, and air as the elements that govern a body’s health. Honey, pearls, and metals are used in Unani preparations.