Vitamin D2 Side Effects
Generic name: ergocalciferol
Medically reviewed by Drugs.com. Last updated on Apr 25, 2022.
Note: This document contains side effect information about ergocalciferol. Some of the dosage forms listed on this page may not apply to the brand name Vitamin D2.
For the Consumer
Applies to ergocalciferol: oral capsule, oral capsule liquid filled, oral liquid, oral solution, oral tablet
Side effects requiring immediate medical attention
Along with its needed effects, ergocalciferol (the active ingredient contained in Vitamin D2) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking ergocalciferol:
Incidence not known
- Bloody or cloudy urine
- blurred vision
- decrease in height
- dry mouth
- frequent urination
- increased thirst
- increased urge to urinate during the night
- increased volume of pale, dilute urine
- loss of appetite
- pain in the back, ribs, arms, or legs
- pain in the lower back or side
- pounding in the ears
- slow growth in children
- slow or fast heartbeat
- swelling of the face, fingers, or lower legs
- trouble breathing
- unusual tiredness or weakness
- waking to urinate at night
- weight gain
Side effects not requiring immediate medical attention
Some side effects of ergocalciferol may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Incidence not known
For Healthcare Professionals
Applies to ergocalciferol: compounding powder, injectable solution, oral capsule, oral solution, oral tablet
Rare (less than 0.1%): Hypercalcemia
Frequency not reported: Hypervitaminosis D[Ref]
Hypervitaminosis D is characterized by: impairment of renal function with polyuria, nocturia, polydipsia, hypercalciuria, reversible azotemia, hypertension, nephrocalcinosis, generalized vascular calcification, or irreversible renal insufficiency which may result in death; intellectual disability; widespread calcification of the soft tissues, including the heart, blood vessels, renal tubules, and lungs; bone demineralization (osteoporosis) in adults; decline in the average rate of linear growth and increased mineralization of bones in infants and children (dwarfism), vague aches, stiffness, and weakness; nausea, anorexia, constipation; and mild acidosis, anemia, and weight loss.[Ref]
Rare (less than 0.1%): Hypercalciuria[Ref]
Frequently asked questions
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More about Vitamin D2 (ergocalciferol)
- Drug interactions
- Dosage information
- During pregnancy
- Reviews (8)
- Drug images
- Compare alternatives
- Pricing & coupons
- Drug class: vitamins
Related treatment guides
1. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
2. "Product Information. Drisdol (ergocalciferol)." sanofi-aventis (2016):
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.