Vitamin B6: sensory neuropathic syndrome, unstable gait, numb feet, awkwardness of hands, perioral numbness, decreased sensation to touch temperature and vibration, paresthesia, photo allergic reaction and ataxia.
Vitamin B12: allergic hypersensitivity reaction has occurred rarely after cyanocobalamin and include skin reaction such as rash and itching and anaphylaxis. Other adverse effect reported with cyanocobalamin include gastrointestinal disturbances, fever, chills, hot flushing, dizziness, malaise, acneform and bullous eruptions, and tremor.
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