What Are the Major Side Effects of Vitamin D3?


Quick Answer

Side effects of vitamin D-3 may include fatigue, hives or itching, cough, difficulty swallowing, fast heartbeat, skin rash, swelling of the face and mouth, or dizziness, according to Drugs.com. Individuals experiencing any of the side effects should consult with a physician.

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Full Answer

Other serious side effects associated with vitamin D-3 may include urinating more than usual; confusion, mood swings or irritability; chest pain; or feeling short of breath, cautions Drugs.com. Individuals experiencing any of these serious side effects should stop using the supplement and contact a doctor immediately. Signs of vitamin D-3 overdose should also prompt a patient to seek medical attention. Vitamin D-3 overdose may be signaled by weight loss, weakness, a metallic taste in the mouth, muscle or bone pain, and nausea and vomiting.

Individuals should not take vitamin D-3 if they have ever had an allergic reaction to it, if they have a condition that causes malabsorption of vitamins in the body, or if they have high blood levels of calcium or vitamin D, indicates Drugs.com. Further, individuals with heart disease, an electrolyte imbalance or kidney disease should discuss the possibility of taking vitamin D-3 with a physician. Vitamin D3- passes in breast milk, so pregnant or breastfeeding women should consult with a doctor before use.

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