Pyridoxine is vitamin B6. Vitamins occur naturally in foods such as meat, poultry, nuts, whole grains, bananas, and avocados. Vitamin B6 is important for many processes in the body. Pyridoxine is used to treat or prevent vitamin B6 deficiency. It is also used to treat a certain type of anemia (lack of red blood cells). Pyridoxine injection is also used to treat some types of seizure in babies. Pyridoxine taken by mouth (oral) is available without a prescription. Injectable pyridoxine must be given by a healthcare professional. Pyridoxine may also be used for purposes not listed in this medication guide.