Clinical features of vitamin B6 deficiency include peripheral neuropathy presenting as numbness, weakness, and dysesthesias in the limbs, glossitis, cheilitis, pellagra-like symptoms including seborrheic dermatitis and diarrhea, conjunctivitis, sideroblastic anemia, and neurological symptoms such as confusion, depression, insomnia, irritability, chronic fatigue, EEG abnormalities and convulsions, which are often tonic-clonic seizures.