ergocalciferol (vitamin D2)

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Pronunciation: ER goe kal SIF e role

Brand: Calcidol, Calciferol, Drisdol, Vitamin D2

Ergocalciferol 50000 intl units-MAJ

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Vitamin D 1.25 mg-URL

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What is the most important information I should know about ergocalciferol?

Do not use this medication if you have ever had an allergic reaction to vitamin D, or if you have high levels of calcium or vitamin D in your blood, or if you have any condition that makes it hard for your body to absorb nutrients from food (malabsorption).

Before you take this medication, tell your doctor if you are allergic to any drugs or dyes, or if you have heart disease, coronary artery disease, kidney disease, or an electrolyte imbalance.

Do not take other vitamin or mineral supplements unless your doctor has told you to.

Avoid using calcium supplements or antacids without your doctor's advice. Use only the specific type of supplement or antacid your doctor recommends. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Seek emergency medical attention if you think you have used too much of this medicine. An overdose of vitamin D can cause serious or life-threatening side effects.

Overdose symptoms may include headache, weakness, drowsiness, dry mouth, nausea, vomiting, constipation, muscle or bone pain, metallic taste in the mouth, weight loss, itchy skin, changes in heart rate, loss of interest in sex, confusion, unusual thoughts or behavior, feeling unusually hot, severe pain in your upper stomach spreading to your back, or fainting.

What is ergocalciferol?

Ergocalciferol is vitamin D2. Vitamin D is important for the absorption of calcium from the stomach and for the functioning of calcium in the body.

Ergocalciferol is used to treat hypoparathyroidism (decreased functioning of the parathyroid glands).

Ergocalciferol is also used to treat rickets (softening of the bones caused by vitamin D deficiency) or low levels of phosphate in the blood (hypophosphatemia).

Ergocalciferol may also be used for purposes not listed in this medication guide.

What should I discuss with my healthcare provider before taking ergocalciferol?

Do not use this medication if you have ever had an allergic reaction to vitamin D, or if you have:

  • high levels of calcium in your blood (hypercalcemia);
  • high levels of vitamin D in your body (hypervitaminosis D); or
  • any condition that makes it hard for your body to absorb nutrients from food (malabsorption).

To make sure you can safely take ergocalciferol, tell your doctor if you have any of these other conditions:

  • heart disease;
  • coronary artery disease;
  • kidney disease; or
  • an electrolyte imbalance.

FDA pregnancy category C. It is not known whether ergocalciferol will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.

Ergocalciferol can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

How should I take ergocalciferol?

Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.

Your doctor may occasionally change your dose to make sure you get the best results.

Measure liquid medicine with a special dose-measuring spoon or cup, not a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.

To be sure this medication is helping your condition, your blood will need to be tested often. You may also need x-rays. Visit your doctor regularly.

Ergocalciferol is only part of a complete program of treatment that may also include other medications and a special diet. It is very important to follow the medication and diet plan created for you by your doctor or nutrition counselor. You should become very familiar with the list of foods you must eat or avoid to help control your condition.

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 headache, weakness, drowsiness, dry mouth, nausea, vomiting, constipation, muscle or bone pain, metallic taste in the mouth, weight loss, itchy skin, changes in heart rate, loss of interest in sex, confusion, unusual thoughts or behavior, feeling unusually hot, severe pain in your upper stomach spreading to your back, or fainting.

What should I avoid while taking ergocalciferol?

Do not take other vitamin or mineral supplements unless your doctor has told you to.

Avoid using calcium supplements or antacids without your doctor's advice. Use only the specific type of supplement or antacid your doctor recommends.

What are the possible side effects of ergocalciferol?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • thinking problems, changes in behavior, feeling irritable;
  • urinating more than usual;
  • chest pain, feeling short of breath; or
  • early signs of vitamin D overdose (weakness, metallic taste in your mouth, weight loss, muscle or bone pain, constipation, nausea, and vomiting).

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.

What other drugs will affect ergocalciferol?

Tell your doctor about all other medicines you use, especially:

  • sucralfate (Carafate);
  • mineral oil (sometimes taken as a laxative);
  • seizure medication;
  • steroids (prednisone and others);
  • digoxin (digitalis, Lanoxin); or
  • a diuretic (water pill) such as chlorothiazide (Diuril), hydrochlorothiazide (HCTZ, HydroDiuril, Hyzaar, Lopressor HCT, Vasoretic, Zestoretic), chlorthalidone (Hygroton, Thalitone), indapamide (Lozol), metolazone (Mykrox, Zaroxolyn), and others.

This list is not complete and other drugs may interact with ergocalciferol. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about ergocalciferol.


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.

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