Drug interactions
Calcium carbonate + Nifedipine
Severity: Minor
Calcium carbonate and Nifedipine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Calcium can in theory oppose the effect of calcium channel blockers. Oral calcium supplements at usual doses rarely reduce nifedipine's effect, but hypercalcemia or parenteral calcium may do so.
What this interaction means in plain words
Calcium carbonate and Nifedipine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Calcium carbonate belongs to Gastrointestinal Tract; Nifedipine belongs to Cardiovascular.
Why it happens
Pharmacodynamic antagonism: raised extracellular calcium may counteract calcium channel blockade.
What to do
No routine change is needed with usual oral calcium doses. Monitor blood pressure and serum calcium if high-dose calcium or vitamin D is used.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Calcium carbonate
Other interactions of Nifedipine
Frequently asked questions
Can I take Calcium carbonate with Nifedipine?
MediHelp rates the interaction as minor. Calcium carbonate and Nifedipine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Calcium can in theory oppose the effect of calcium channel blockers. Oral calcium supplements at usual doses rarely reduce nifedipine's effect, but hypercalcemia or parenteral calcium may do so.
How serious is the interaction between Calcium carbonate and Nifedipine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed with usual oral calcium doses. Monitor blood pressure and serum calcium if high-dose calcium or vitamin D is used.
What other medicines interact with Calcium carbonate?
MediHelp also lists interactions of Calcium carbonate with, for example, Acalabrutinib, Alendronate, Amlodipine-hydrochlorothiazide-valsartan. The full list is on the Calcium carbonate page.
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