Drug interactions
Calcium carbonate + Tolbutamide
Severity: Minor
Calcium carbonate and Tolbutamide: 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
Antacids can speed absorption of sulfonylureas, potentially increasing their glucose-lowering effect. Significance with calcium carbonate is limited, but hypoglycemia is possible.
What this interaction means in plain words
Calcium carbonate and Tolbutamide 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; Tolbutamide belongs to Endocrine.
Why it happens
Altered gastric pH and possible urinary alkalinization may increase tolbutamide absorption and clearance changes.
What to do
Monitor blood glucose when regular antacid use begins or stops. Adjust tolbutamide if glucose control changes.
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 Tolbutamide, 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 Tolbutamide
- Glyburide-metformin + Tolbutamide Major
- Insulin degludec-liraglutide + Tolbutamide Major
- Aceclofenac + Tolbutamide Moderate
- Acemetacin + Tolbutamide Moderate
- Acetylsalicylic acid + Tolbutamide Moderate
- Albiglutide + Tolbutamide Moderate
Frequently asked questions
Can I take Calcium carbonate with Tolbutamide?
MediHelp rates the interaction as minor. Calcium carbonate and Tolbutamide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Antacids can speed absorption of sulfonylureas, potentially increasing their glucose-lowering effect. Significance with calcium carbonate is limited, but hypoglycemia is possible.
How serious is the interaction between Calcium carbonate and Tolbutamide?
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 blood glucose when regular antacid use begins or stops. Adjust tolbutamide if glucose control changes.
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.
