• Isoniazid, a tuberculostatic drug
  • Deficiency symptoms
    1. Human
      1. Skin changes: dermatitis, glossitis
      2. Hematologic changes: decreases in lymphocytes, anemia
      3. Nervousness, electroencephalographic abnormalities, neurotic
      4. tendencies, depression, convolusive seizures
    2. Pigs
      1. Growth failure, anorexia
      2. Rough hair coat
      3. Microcytic hypochromic anemia
      4. Ataxia, demyelinizatoin of peripheral nerves
  • VI.  Toxicity

    1. Acute toxicity is very low
    2. Chronic use of 2-6 g/day (1000-2700 times the RDA) in humans results in nervous system disorders similar to those seen with a deficiency





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