Hypervitaminosis D
Definition
Hypervitaminosis D is a condition that occurs after taking excessive doses of vitamin D.
Alternative Names
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
Exams and Tests
- Hypercalcemia (excess calcium in the blood)
- Hypercalciuria (excess calcium in the urine)
- Hypertension (high blood pressure)
- Polydipsia (excessive thirst)
- Polyuria (passing large amounts of urine)
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.
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 show symptoms of hypervitaminosis D and have been taking vitamin D in excess of the recommended daily allowance. Also call if you or your child show symptoms and you have been taking a prescription form of vitamin D.
Prevention
To prevent this condition, pay careful attention to the correct vitamin D dose.
Reviewed By: Nancy J. Rennert, M.D., Chief of Endocrinology Diabetes, Norwalk Hospital, Associate Clinical Professor of Medicine, Yale University School of Medicine, New Haven, CT. Review provided by VeriMed Healthcare Network.
