Sign Out
Vitamin B1 - symptoms: hypersensitivity and anaphylactic shock. Doses of 500 mg/day for a month were administered without toxic effects.
Vitamin B6 - symptoms: patient receiving 2 to 7 g/day (or greater than 0.2 g/day for longer than 2 months) have developed sensory neuropathy with associated ataxia, numbness of hands and feet, unsteady gait, difficulty in handling small object, ataxia, severely impaired position and vibration sensation, less dramatic effects on light touch, pain sensation, and temperature, diminished deep tendon reflexes and Lhermitte's sign (neck pain and tingling that shoots down the spine to the legs and feet after neck flexion). When pyridoxine is discontinued, symptoms will lessen. It may take 6 months for sensation to normalize.
Vitamin B12 - symptoms: vitamin B12 is essential nontoxic in humans. Allergic reactions and hypersensitivity have been reported.
