Gangeru consists of dried stem bark of Grewia tenax (Forsk.) Aschers & Schwf., Syn. Grewia populifolia Vahl, (Fam. Tiliacem), a shrub 0.6-1.0 m high, occurring in North Western and central part of the country and in Deccan Peninsula.
The plant is an excellent astringent, cardiac tonic, diuretic and aphrodisiac agent. It is commonly used for the treatment of ulcers. It is also used for treating stomach disorders. In addition to that it is very useful to cure some skin and intestinal infections. It is also reported to show some antibiotic properties.
Gangeru or Gangeran or Grewia Tenax is explained by Charak Samhita and Sushruta Samhita. It has blocking action useful in bleeding disorder such as menorrhagia, ulcerative colitis etc. Bhavapraksha considers Gangeruki as synonym of Nagabala.
It Balances Kapha and Pitta Dosha.