Drug interactions
Calcium carbonate + Mexiletine
Severity: Minor
Calcium carbonate and Mexiletine: 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
Alkaline urine reduces mexiletine elimination and can increase levels and toxicity. Calcium carbonate has a mild effect, so impact is usually small unless urine becomes persistently alkaline.
What this interaction means in plain words
Calcium carbonate and Mexiletine 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; Mexiletine belongs to Cardiovascular.
Why it happens
Urinary alkalinization increases tubular reabsorption of mexiletine and lowers its renal clearance.
What to do
Monitor for tremor, dizziness or nausea, and consider mexiletine levels if large antacid doses are used regularly.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Calcium carbonate and Mexiletine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Calcium carbonate
Other interactions of Mexiletine
- Fezolinetant + Mexiletine Contraindicated
- Mexiletine + Pimozide Contraindicated
- Alosetron + Mexiletine Major
- Amiodarone + Mexiletine Major
- Clozapine + Mexiletine Major
- Cobicistat + Mexiletine Major
Frequently asked questions
Can I take Calcium carbonate with Mexiletine?
MediHelp rates the interaction as minor. Calcium carbonate and Mexiletine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Alkaline urine reduces mexiletine elimination and can increase levels and toxicity. Calcium carbonate has a mild effect, so impact is usually small unless urine becomes persistently alkaline.
How serious is the interaction between Calcium carbonate and Mexiletine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for tremor, dizziness or nausea, and consider mexiletine levels if large antacid doses are used regularly.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
