Drug interactions
Calcium carbonate + Diltiazem
Severity: Minor
Calcium carbonate and Diltiazem: 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 may theoretically oppose the effects of calcium channel blockers, and intravenous calcium is used to treat overdose. Oral calcium at usual doses rarely changes diltiazem response.
What this interaction means in plain words
Calcium carbonate and Diltiazem 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; Diltiazem belongs to Cardiovascular.
Why it happens
Raised extracellular calcium can pharmacodynamically oppose L-type calcium channel blockade.
What to do
No routine adjustment is needed; check serum calcium if diltiazem response seems reduced during high-dose calcium or vitamin D therapy.
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 Diltiazem
- Diltiazem + Flibanserin Contraindicated
- Diltiazem + Ivabradine Contraindicated
- Diltiazem + Lomitapide Contraindicated
- Diltiazem + Lonafarnib Contraindicated
- Acebutolol + Diltiazem Major
- Alfentanil + Diltiazem Major
Frequently asked questions
Can I take Calcium carbonate with Diltiazem?
MediHelp rates the interaction as minor. Calcium carbonate and Diltiazem 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 may theoretically oppose the effects of calcium channel blockers, and intravenous calcium is used to treat overdose. Oral calcium at usual doses rarely changes diltiazem response.
How serious is the interaction between Calcium carbonate and Diltiazem?
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 adjustment is needed; check serum calcium if diltiazem response seems reduced during high-dose calcium or vitamin D therapy.
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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