Are there any side effects of calcium citrate with vitamin D?

Yes, but side effects of calcium citrate with vitamin D are generally minor. Your doctor may suggest ways alleviate them if they do not subside or interfere with your daily life. The most common side effects of this supplement include headache, constipation, excess gas, and minor stomach upset.

Get emergency medical attention if you experience symptoms of an allergic reaction to calcium citrate, including difficulty breathing; tightness in your chest; itching; rash; hives; or swelling of your mouth, face, lips, or tongue. Other serious side effects requiring immediate medical attention include nausea, vomiting, loss of appetite, severe or persistent constipation, confusion, irritability, or fatigue.