Generally well tolerated. Very high or prolonged doses of vitamin B6 can, rarely, cause nerve symptoms such as tingling. Do not exceed the recommended dose or take alongside other B6 products without advice. May turn urine bright yellow, which is harmless. Tell your doctor before use if pregnant, breastfeeding, or on other medicines (B6 can affect some, such as levodopa). Store in a cool, dry place. This product information is for general guidance only and does not replace professional medical advice. Keep all medicines out of reach of children.