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Hypervitaminosis D
Definition
Hypervitaminosis D is a condition that occurs after taking excessive doses of vitamin D.
Alternative Names
Vitamin D toxicity
Causes, incidence, and risk factors
An excess of vitamin D causes abnormally high levels of calcium in the blood, which can eventually severely damage the bones, soft tissues, and kidneys. It is almost always caused by forms of vitamin D that require a doctor's prescription.
Symptoms
Signs and tests
- Excess calcium in the blood (hypercalcemia)
- Excess calcium in the urine (hypercalciuria)
- Excessive thirst (polydipsia)
- High blood pressure
- Passing large amounts of urine (polyuria)
Tests to confirm the diagnosis:
- 1,25 dihydroxyvitamin D levels
- 25-hydroxyvitamin D levels
- Serum calcium
- Serum phosphorus
- X-ray of the bone
Treatment
Stop taking vitamin D. Consult your physician. In severe cases, other treatment may be necessary.
Expectations (prognosis)
Recovery is expected.
Complications
- Dehydration
- Hypercalcemia
- Kidney damage
- Kidney stones
Calling your health care provider
Call your health care provider if:
- You or your child shows symptoms of hypervitaminosis D and has been taking more vitamin D than the recommended daily allowance
- You or your child shows symptoms and has been taking a prescription form of vitamin D
Prevention
To prevent this condition, pay careful attention to the correct vitamin D dose.
Review Date:
11/23/2009
Reviewed By: Ari S. Eckman, MD, Division of Endocrinology and Metabolism, Johns Hopkins School of Medicine, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
Reviewed By: Ari S. Eckman, MD, Division of Endocrinology and Metabolism, Johns Hopkins School of Medicine, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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