He took great interest in the expansion and development of the native system of Unani medicine and to that end built three important institutions, the Central College in Delhi, the Hindustani Dawakhana and the Ayurvedic and Unani Tibbia College better known as Tibbia College, Delhi, which expanded research and practice in the field and saved the Unani System of Medicine from extinction in India. His untiring efforts in this field infused a new force and life into an otherwise decaying Unani medical system under British rule. Khan proposed the absorption of Western concepts within the Unani system, a view diametrically opposite to that adopted by physicians of the Lucknow school who wanted to maintain the system's purity.