Drug Interactions between calcium / vitamin d and Vitamin D3
This report displays the potential drug interactions for the following 2 drugs:
- calcium/vitamin d
- Vitamin D3 (cholecalciferol)
Interactions between your drugs
ergocalciferol cholecalciferol
Applies to: calcium / vitamin d and Vitamin D3 (cholecalciferol)
Using ergocalciferol together with cholecalciferol should generally be avoided unless otherwise directed by your doctor. Both of these medications are forms of vitamin D, and taking too much vitamin D can lead to toxic effects related to excessive calcium levels in the blood and urine, such as irregular heart rhythm, seizures, kidney stones, and eventual calcification of blood vessels, cornea, and soft tissues of the body. If you take digoxin, a common heart medication, having a high blood level of calcium can also increase the risk of developing digoxin toxicity. Talk to your doctor if you have any questions or concerns. You will need close monitoring of your calcium and phosphorus levels to safely use these medications. You should avoid an abrupt increase in your dietary calcium intake, and seek medical attention if you experience early symptoms of vitamin D intoxication such as weakness, fatigue, headache, drowsiness, vertigo, ringing in the ears, loss of appetite, nausea, vomiting, constipation, dry mouth, metallic taste, muscle pain, bone pain, muscle incoordination, and low muscle tone. Late symptoms may include frequent urination, excessive thirst, weight loss, conjunctivitis ("pink eye"), light sensitivity, runny nose, itching, increased body temperature, and irregular heart rhythm. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Drug and food interactions
calcium carbonate food
Applies to: calcium / vitamin d
Calcium absorption may be increased by taking it with food. However, foods high in oxalic acid (spinach or rhubarb), or phytic acid (bran and whole grains) may decrease calcium absorption. Calcium may be taken with food to increase absorption. Consider spacing calcium administration for at least 2 hours before or after consuming foods high in oxalic acid or phytic acid. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Therapeutic duplication warnings
Therapeutic duplication is the use of more than one medicine from the same drug category or therapeutic class to treat the same condition. This can be intentional in cases where drugs with similar actions are used together for demonstrated therapeutic benefit. It can also be unintentional in cases where a patient has been treated by more than one doctor, or had prescriptions filled at more than one pharmacy, and can have potentially adverse consequences.
Vitamin d analogs
Therapeutic duplication
The recommended maximum number of medicines in the 'vitamin d analogs' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'vitamin d analogs' category:
- calcium/vitamin d
- Vitamin D3 (cholecalciferol)
Note: In certain circumstances, the benefits of taking this combination of drugs may outweigh any risks. Always consult your healthcare provider before making changes to your medications or dosage.
See also
Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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