Pyridoxine or vitamin B6 is a highly water-soluble vitamin that plays an important part in the functioning of many enzymes, especially those involved in amino acid metabolism. A normal adult will require 1–2 mg of pyridoxine per day. This is adequately supplied by a normal diet. Requirements are increased in pregnancy, in malnourished patients and in patients who are taking drugs that cause a depletion of pyridoxine— for …