Side Effects of This Dietary Supplement

Along with its needed effects, a dietary supplement may cause some unwanted effects. Alfacalcidol, calcifediol, calcitriol, dihydrotachysterol, and ergocalciferol do not usually cause any side effects when taken as directed. However, taking large amounts over a period of time may cause some unwanted effects that can be serious .

Check with your doctor immediately if any of the following effects occur:

Late symptoms of severe overdose

High blood pressure; high fever; irregular heartbeat; stomach pain (severe)

Check with your health care professional as soon as possible if any of the following effects occur:

Early symptoms of overdose

Bone pain; constipation (especially in children or adolescents); diarrhea; drowsiness; dryness of mouth; headache (continuing); increased thirst; increase in frequency of urination, especially at night, or in amount of urine; irregular heartbeat; itching skin; loss of appetite; metallic taste; muscle pain; nausea or vomiting (especially in children or adolescents); unusual tiredness or weakness

Late symptoms of overdose

Bone pain; calcium deposits (hard lumps) in tissues outside of the bone; cloudy urine; drowsiness; increased sensitivity of eyes to light or irritation of eyes; itching of skin; loss of appetite; loss of sex drive; mood or mental changes; muscle pain; nausea or vomiting; protein in the urine; redness or discharge of the eye, eyelid, or lining of the eyelid; runny nose; weight loss

Other side effects not listed above may also occur in some individuals. If you notice any other effects, check with your health care professional.