vitamin B6

(redirected from B6 Vitamin)
Also found in: Dictionary, Thesaurus, Encyclopedia.

vi·ta·min B6

pyridoxine and related compounds (pyridoxal; pyridoxamine).
Farlex Partner Medical Dictionary © Farlex 2012

vitamin B6

A widely used generic term for the water-soluble derivatives of 2-methyl pyridine, including pyridoxine, pyridoxal and pyridoxamine, which are critical to immune function, neural transmission, metabolism and red cell synthesis. Vitamin B6 is obtained in the diet in avocados, bananas, brown rice, corn, fish, meat, nuts, poultry and whole grains; pharmacologic doses may be effective for carpal tunnel syndrome, seizures in infants and in premenstrual syndrome.
 
Toxicity
Severe nerve damage, which requires months for recuperation.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

megavitamin therapy

The administration of excess or 'hyper-doses' of water-soluble vitamins, either physician-guided–eg, to treat neuropathies, or self-prescribed by health-food advocates. See Decavitamin, Orthomolecular medicine, Vitamin.
Megavitamins, adverse effects  
Thiamin CNS hyperresponsiveness–convulsions, Parkinson's disease–thiamin antagonizes l-dopa, sensory neuropathy–destruction of dorsal axon roots
Niacin/nicotinic acid & niacinamide/nicotinamide Exacerbation of asthma–histamine release, cardiac disease–arrhythmias, GI symptoms, eg nausea, vomiting, diarrhea, anorexia, DM–hyperglycemia, gout–↑ uric acid, liver disease–enzyme leakage, hepatocellular injury, portal fibrosis or massive necrosis, cholestatic jaundice, peptic ulcer disease–histamine release, ↑ acidity, skin disease
Vitamin B6 Paresthesia, headaches, asthenia, irritability
Vitamin C ↑ Iron absorption, possibly iron overload, evoking diarrhea, renal calculus formation and possibly inhibiting the bacteriolytic activity of neutrophils, G6PD deficiency–↑ red cell lysis, megaloblastic anemia–↓ vitamin B12 absorption, nephrolithiasis–oxaluria Diagn Clin Testing 1990; 28:27  
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

vi·ta·min B6

(vīt'ă-min)
Pyridoxine and related compounds (pyridoxal; pyridoxamine).
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

vi·ta·min B6

(vītă-min)
Pyridoxine and related compounds (e.g., pyridoxal; pyridoxamine).
Medical Dictionary for the Dental Professions © Farlex 2012