megavitamin therapy


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megavitamin therapy

[-vī′təmin]
a type of treatment that involves the administration of large doses of certain vitamins and minerals.
The administration of supraphysiologic or in some cases ‘hyper-doses’—up to hundreds of times daily requirement—of vitamins, based on the belief that it will correct an unnamed disorder

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  

meg·a·vi·ta·min ther·a·py

(meg'ā-vī'tă-min thār'ă-pē)
Large doses of vitamins, minerals, and amino acids that are used as medications to treat physical and psychiatric illnesses.
Synonym(s): orthomolecular medicine.
References in periodicals archive ?
Kunin ends his presentation with no formal conclusion other than that megavitamin therapy is ready to emerge from controversy and enter the mainstream of medical practice.
1) "When megavitamin therapy and prayer specifically for health reasons are included in the definition of CAM, that number rises to 62 percent," the survey explains.
Orthomolecular Health Medicine (OHM) is a close-knit group, based in San Francisco, advocating nutrition and megavitamin therapy.
Treating depression and anxiety disorders did not seem to be beyond the purview of megavitamin therapy.