What are the possible side effects of Vitamin D (Ergocalciferol (Vitamin D2))?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop taking ergocalciferol and call your doctor at once if you have a serious side effect such as: thinking problems, changes in behavior, feeling irritable urinating more than usual chest pain, feeling short of breath; or early signs of vitamin D overdose (weakness, metallic taste in your mouth, weight loss, muscle or bone pain, constipation, nausea, and vomiting) This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.