Hypervitaminosis

hypervitaminosis /hy·per·vi·ta·min·o·sis/ (-vi?tah-mi-no´sis) a condition due to ingestion of an excess of one or more vitamins; symptom complexes are associated with excessive intake of vitamins A and D.hypervitaminot´ic

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hy·per·vi·ta·min·o·sis (hpr-vt-m-nss)

n.

Any of various abnormal conditions in which the physiological effect of a vitamin is produced to a pathological degree by excessive intake of the vitamin.

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Hypervitaminosis

Another name for vitamin toxicity.

Mentioned in: Vitamin Toxicity

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hypervitaminosis

a condition produced by ingestion or injection of excessive amounts of vitamins; symptom complexes are associated with excessive intake of vitamins A and D.

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hypervitaminosis A

occurs mainly in cats, and is caused by a long-term diet consisting almost entirely of liver. Affected cats show neck pain and stiffness caused by a deforming cervical spondylosis. Other joints may be similarly affected. There is also hyperesthesia, irritability, anorexia, weight loss, and sometimes neurological deficits. Premature loss of teeth has also been reported.

hypervitaminosis D

caused by overdosing with vitamin D preparations as in milk fever prophylaxis and inappropriate treatment of disorders of dietary calcium and phosphorus, by errors in a diet mix, and oversupplementation of small puppies and kittens. Causes dystrophic soft tissue calcification, particularly nephrocalcinosis with subsequent renal failure. See also enzootic calcinosis.