Since calcitriol is a derivative of vitamin D, the symptoms of overdose are the same as for an overdose of Vitamin D. Intake of high doses of calcium and phosphate together with calcitriol may give rise to similar symptoms. A high calcium level in the dialysate may contribute to the development of hypercalcemia.
Acute Symptoms of Vitamin D Intoxication: Anorexia, headache, vomiting and constipation.
Chronic Symptoms: Dystrophy (weakness, loss of weight). Sensory disturbances, possibly fever with thirst, polyuria, dehydration, apathy, arrested growth and urinary tract infections.
Hypercalcemia ensures, with metastatic calcification of the renal cortex, myocardium, lungs and pancreas.
Treatment: The following measures should be considered in treatment of accidental overdosage: Immediate gastric lavage or induction of vomiting to prevent further absorption.
Administration of liquid paraffin to promote fecal excretion.
Repeated serum calcium determinations are advisable. If elevated calcium levels persist in the serum, phosphates and corticosteroids may be administered and measures instituted to bring about adequate diuresis.
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