Pyridoxine hydrochloride is a water soluble vitamin of the B complex. It is essential for human metabolism and is found in many foods, including meat, fish, poultry, legumes, nuts, and whole grains. Pyridoxine hydrochloride is used to treat deficiencies of the vitamin and to prevent them from occurring. It is also used to treat other conditions, such as carpal tunnel syndrome and sideroblastic anemia.