hypervitaminosis A (hīpurvī´t
m-inō´sis),
hypervitaminosis A
m-inō´sis),n the effects of toxic doses of vitamin A. Manifestations include bone fragility, xeroderma, nausea, headache, and loss of hair.
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.
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.
hypervitaminosis A
Vitamin A toxicity, see there
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