Medically reviewed on November 6, 2017
What is Calcidol?
Calcidol is vitamin D2. Vitamin D helps your body absorb calcium.
Calcidol is used to treat hypoparathyroidism (decreased functioning of the parathyroid glands).
Calcidol may also be used for purposes not listed in this medication guide.
You should not take Calcidol if you have had an allergic reaction to vitamin D, or if you have high levels of calcium or vitamin D in your body, or any condition that makes it hard for your body to absorb nutrients from food (malabsorption).
Use only the recommended dose of ergocalciferol. An overdose could cause serious or life-threatening side effects.
Before taking this medicine
You should not take Calcidol if you have had an allergic reaction to vitamin D, or if you have:
high levels of vitamin D in your body (hypervitaminosis D);
high levels of calcium in your blood (hypercalcemia); or
any condition that makes it hard for your body to absorb nutrients from food (malabsorption).
To make sure Calcidol is safe for you, tell your doctor if you have ever had:
kidney disease; or
an electrolyte imbalance.
Certain forms of ergocalciferol may contain ingredients you should know about, such as peanut or soybean oil, sugar, aspartame (phenylalanine), or certain food dyes. Ask a doctor before using Calcidol if you have allergies, diabetes, or phenylketonuria (PKU).
Too much vitamin D could harm an unborn baby, and your dose needs may be different during pregnancy. Tell your doctor if you are pregnant or if you become pregnant while taking Calcidol.
Ergocalciferol can pass into breast milk and may cause side effects in the nursing baby. Tell your doctor if you are breast-feeding.
Do not give Calcidol to a child without medical advice. Your child's dose will depend on age, weight, diet, and other factors.
How should I take Calcidol?
Follow all directions on your prescription label. Use only the recommended dose of ergocalciferol. Do not use this medicine in larger or smaller amounts or for longer than recommended.
It may be best to take Calcidol after a meal, but you may take this medicine with or without food.
Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.
While using Calcidol, you will need frequent blood tests. You may also need x-rays.
Your doctor may begin to reduce your Calcidol dose as your condition improves. Carefully follow all instructions about adjusting your dose. In some cases, there may be a very small difference in amount between safe and dangerous doses of this medicine.
Your doctor will determine how long to treat you with this medicine.
Calcidol may be only part of a complete program of treatment that also includes dietary changes and taking calcium and vitamin supplements. Follow your doctor's instructions very closely.
Learn about the foods you should eat to make sure you get enough calcium and vitamin D in your diet. Your Calcidol dose may need to be adjusted as you make changes to your diet.
Store at room temperature away from moisture, heat, and light.
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of vitamin D can cause serious or life-threatening side effects.
Overdose symptoms may include nausea, loss of appetite, thirst, urinating more or less than usual, body aches, stiffness, confusion, or irregular heartbeats.
What should I avoid while taking Calcidol?
Ask a doctor or pharmacist before taking any multivitamins, mineral supplements, or antacids while you are taking Calcidol.
Calcidol side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop taking this medicine and call your doctor at once if you have:
chest pain, feeling short of breath;
growth problems (in a child taking Calcidol); or
Less serious side effects may be more likely, and you may have none at all.
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.
See also: Side effects (in more detail)
What other drugs will affect Calcidol?
Certain medications can make it harder for your body to absorb vitamin D. If you take other medications, take them at least 2 hours before or 2 hours after you take Calcidol.
Tell your doctor about all your current medicines and any you start or stop using, especially:
a diuretic or "water pill"; or
mineral oil (sometimes taken as a laxative).
This list is not complete. Other drugs may interact with ergocalciferol, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2018 Cerner Multum, Inc. Version: 5.01.
More about Calcidol (ergocalciferol)
- Calcidol Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- Support Group
- En Español
- 0 Reviews
- Drug class: vitamins