Drug interactions
Calcium carbonate + Ephedrine
Severity: Minor
Calcium carbonate and Ephedrine: 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 carbonate can alkalinize urine, which reduces renal excretion of ephedrine and may prolong its effects. This could increase tachycardia, hypertension or nervousness.
What this interaction means in plain words
Calcium carbonate and Ephedrine 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; Ephedrine belongs to Cardiovascular.
Why it happens
Urinary alkalinization increases tubular reabsorption of the weakly basic ephedrine, lowering renal clearance.
What to do
Monitor heart rate and blood pressure when antacids are used regularly with ephedrine. Reduce the ephedrine dose if adverse stimulant effects occur.
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 Ephedrine
- Ephedrine + Isocarboxazid Contraindicated
- Ephedrine + Phenelzine Contraindicated
- Ephedrine + Procarbazine Contraindicated
- Ephedrine + Rasagiline Contraindicated
- Ephedrine + Selegiline Contraindicated
- Ephedrine + Tranylcypromine Contraindicated
Frequently asked questions
Can I take Calcium carbonate with Ephedrine?
MediHelp rates the interaction as minor. Calcium carbonate and Ephedrine 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 can alkalinize urine, which reduces renal excretion of ephedrine and may prolong its effects. This could increase tachycardia, hypertension or nervousness.
How serious is the interaction between Calcium carbonate and Ephedrine?
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 heart rate and blood pressure when antacids are used regularly with ephedrine. Reduce the ephedrine dose if adverse stimulant effects occur.
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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