Some forms available by generic name. Are allergic to vitamin D, ergocalciferol or any vitamin-D derivative. Any plans to become pregnant while taking vitamin D. Epilepsy. Heart or blood-vessel disease. Kidney, liver, pancreatic disease.
Supplements are often necessary.
Taking too much during pregnancy may cause abnormalities in fetus. Consult doctor before taking supplement to ensure correct dosage. Don't take megadoses. Consult doctor about supplements. Don't take megadoses.