Tianma (Gastrodia elata Blume) is a traditional Chinese medicine (TCM) often used for the treatment of headache, convulsions, hypertension and neurodegenerative diseases. Tianma also modulates the cleavage of the amyloid precursor protein App and cognitive functions in mice.

天麻，中药名。为兰科植物天麻Gastrodia elata Bl.的干燥块茎。具有息风止痉，平抑肝阳，祛风通络的功效。幫助肝风内动，惊痫抽搐，眩晕，头痛，肢体麻木，手足不遂，风湿痹痛等。