[Overdose or hypersensitivity to vitamin D?] [Article in French]
Arch Pediatr. 2014 Aug 13. pii: S0929-693X(14)00324-8. doi: 10.1016/j.arcped.2014.06.025. [Epub ahead of print]
Hmami F1, Oulmaati A2, Amarti A3, Kottler ML4, Bouharrou A2.
1Service de néonatologie et réanimation néonatale, CHU Hassan II, 30000 Fès, Maroc; Université Sidi Mohammed Ben Abdellah, faculté de médecine et de pharmacie, Fès, Maroc. Electronic address: fhmami at hotmail.com.
2Service de néonatologie et réanimation néonatale, CHU Hassan II, 30000 Fès, Maroc; Université Sidi Mohammed Ben Abdellah, faculté de médecine et de pharmacie, Fès, Maroc.
3Laboratoire de biochimie, CHU Hassan II, 30000 Fès, Maroc; Université Sidi Mohammed Ben Abdellah, faculté de médecine et de pharmacie, Fès, Maroc.
4Service de génétique, pôle de biologie, CHU, 14033 Caen, France.
Vitamin D intoxication with severe hypercalcemia is rare in the neonatal and infancy period. Through nine cases of hypercalcemia, secondary to taking 600,000 units of vitamin D (Sterogyl®), a review of vitamin D requirements and possible mechanisms of toxicity including hypersensitivity to this vitamin will be discussed. We report nine cases of babies admitted to our department between the ages of 25 and 105 days for treatment of severe dehydration. The pregnancies were normal, with no incidents at delivery. Clinical signs were dominated by weight loss, vomiting, and fever. Examination on admission revealed dehydration whose degree ranged from 8 to 15% with preserved diuresis and loss weight between 100 and 1100 g. Laboratory tests objectified hypercalcemia between 113 and 235mg/L, hypercalciuria (urinary calcium/creatinine mmol/mmol >0.5), and a low-level of parathyroid hormone. The vitamin D values in nine patients were toxic (344-749 nmol/L; normal >50 nmol/L; toxicity if >250 nmol/L). Abdominal ultrasound objectified renal nephrocalcinosis in seven patients. The DNA study, performed in eight patients, did not reveal a mutation of the vitamin D 24-hydroxylase gene (CYP24A1). The treatment consisted of intravenous rehydration with treatment of hypercalcemia (diuretics and corticosteroids). Serum calcium returned to the normal range within 4-50 days, with weight gain progressively over the following weeks. The follow-up (2 years for the oldest case) showed the persistence of images of nephrocalcinosis. Genetic susceptibility and metabolic differences appear to modulate the threshold of vitamin D toxicity. However, respect for recommended doses, recognized as safe in a large study population, reduces the risk of toxicity.
Copyright © 2014 Elsevier Masson SAS. All rights reserved.
PMID: 25129320
Comment by VitaminDWiki
It is amazing that after scores of studies showing the D2 decreases D3 levels in the body and causes other problems that D2 is stil being given.
I guess the medical profession is VERY SLOW to change.
For a few years the doctors had an excuse that only D2 was available for prescription.
But now, D3 is available for prescription in most countries.
By the way. Vets decided years ago that D2 should not be used on any mammals - too many problems.
See also VitaminDWiki
- Veterinary and D category listing with associated searches
- 10 million IU of vitamin D3 for cows was great unless had vitamin D2 – July 2011
- Overview Veterinary and vitamin D
- Overview Vitamin D3 not D2