Hypervitaminosis D is a condition that occurs after taking excessive doses of vitamin D.
Causes
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
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Constipation
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Decreased appetite (anorexia)
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Dehydration
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Fatigue
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Irritability
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Muscle weakness
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Vomiting
Exams and Tests
- Excess calcium in the blood (hypercalcemia)
- Excess calcium in the urine (hypercalciuria)
- Excessive thirst (polydipsia)
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High blood pressure
- Passing large amounts of urine (polyuria)
Tests to confirm the diagnosis:
- 1,25-dihydroxy vitamin D levels
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25-hydroxy vitamin D levels
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Serum calcium
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Serum phosphorus
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X-ray of the bone
Treatment
Stop taking vitamin D. Consult your physician. In severe cases, other treatment may be necessary.
Outlook (Prognosis)
Recovery is expected.
Possible Complications
- Dehydration
- Hypercalcemia
- Kidney damage
- Kidney stones
When to Contact a Medical Professional
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.
Alternative Names
Vitamin D toxicity
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