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Brand & Generic Names

Calciferol Drisdol
Calcijex Hytakerol
Calderol Ostoforte
Deltalin Radiostol
DHT Radiostol Forte
DHT Intensol Rocaltrol
Numerous other multiple vitam in-mineral supplements. Check

Basic Information

  • Habit forming? No
  • Prescription needed? Low strength: No High strength: Yes
  • Available as generic? Yes
  • Drug class: Vitamin supplement


  • Dietary supplement.
  • Prevention of rickets (bone disease).
  • Treatment for hypocalcemia (low blood calcium) in kidney disease.
  • Treatment for postoperative muscle contractions.
  • Daily supplement for people who must use sunscreen daily.

Dosage & Usage Information

How to take:
Tablet, capsule or liquid--Swallow with liquid.
Drops--Dilute dose in beverage.
Injection--Take under doctor's supervision.

When to take:
As directed, usually once a day at the same time each day.

If you forget a dose:
Take up to 12 hours late. If more than 12 hours, wait for next dose (don't double this dose).

What drug does:
Maintains growth and health.
Prevents rickets.
Essential so body can use calcium and phosphate.

Time lapse before drug works:
2 hours. May require 2 to 3 weeks of continual use for maximum effect.

Don't take with:
Non-prescription drugs or drugs in Interaction Section without consulting doctor.


Severe stomach pain, nausea, vomiting, weight loss; bone and muscle pain; increased urination, cloudy urine; mood or mental changes (possible psychosis); high blood pressure, irregular heartbeat; eye irritation or light sensitivity; itchy skin.


    Overdose unlikely to threaten life. If person takes much larger amount than prescribed, call doctor, poison-control center or hospital emergency room for instructions.

Possible Adverse Reactions or Side Effects


    In case of overdose, see Overdose section.


    None expected.


    Headache, metallic taste in mouth, thirst, dry mouth, constipation, appetite loss, nausea, vomiting, weakness, cloudy urine, sensitivity to light.


  • Increased urination, pink eye, psychosis, severe abdominal pain, fever.
  • Muscle pain, bone pain, diarrhea.

Warnings & Precautions

Don't take if:
You are allergic to medicine containing vitamin D.

Before you start, consult your doctor:

  • If you plan to become pregnant while taking vitamin D.
  • If you have epilepsy.
  • If you have heart or blood vessel disease.
  • If you have kidney disease.

Over age 60:
Adverse reactions and side effects may be more frequent and severe than in younger persons.

No problems expected with dose that meets normal daily requirements. Consult doctor.

No problems expected, but consult doctor.

Infants & children:

  • Avoid large doses.
  • Keep vitamins out of children's reach.

Prolonged use:

  • No problems expected.
  • Talk to your doctor about the need for follow-up medical examinations or laboratory studies to check kidney function, liver function, serum calcium.

Skin & sunlight:
Increased sensitivity to light.

Driving, piloting or hazardous work:
No problems expected.

Don't discontinue without doctor's advice until you complete prescribed dose, even though symptoms diminish or disappear.


  • Don't exceed dose. Too much over a long time may be harmful.
  • A balanced diet should provide all the vitamin D a healthy person needs and make supplements unnecessary. Best sources are fish and vitamin-D fortified milk and bread.
  • Some products contain tartrazine dye. Avoid, if allergic (especially aspirin hypersensitivity).
  • Sunscreen prevents the body from manufacturing vitamin D from sunshine. Take supplementary vitamin D if you use sunscreen daily. Ask doctor for dosage.

Possible Interaction with Other Drugs

------------------------ -----------------------
Antacids* (magne- Possible excess
sium-containing) magnesium.
Anticonvulsants, Decreased vitamin D
hydantoin* effect.
Calcium Excess calcium in
(high doses) blood.
Calcium channel Possible decreased
blockers* effect of calcium-channel blockers.
Calcium Excessive absorption
supplements* of vitamin D.
Cholestyramine Decreased vitamin D effect.
Colestipol Decreased vitamin D absorption.
Cortisone Decreased vitamin D effect.
Digitalis Heartbeat
preparations* irregularities.
Diuretics, thiazide* Possible increased calcium.
Mineral oil Decreased vitamin D effect.
Neomycin Decreased vitamin D absorption.
Nicardipine Decreased nicardipine effect.
Phenobarbital Decreased vitamin D effect.
Phosphorous Accumulation of
preparations* excess phosphorous.
Rifampin Possible decreased vitamin D
Vitamin D, other Possible toxicity.

Possible Interaction with Other Substances

--------------- ---------------
Alcohol: None expected.
Beverages: None expected.
Cocaine: None expected.
Foods: None expected.
Marijuana: None expected.
Tobacco: None expected.

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