Drug interactions
Aspirin rectal + Calcium
Severity: Minor
Aspirin rectal and Calcium: 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
Alkalinizing antacids raise urinary pH and increase renal excretion of salicylate, which can lower salicylate levels, mainly at high doses. Calcium carbonate has a weaker effect than sodium bicarbonate, so the effect at usual doses is small.
What this interaction means in plain words
Aspirin rectal and Calcium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Increased urinary pH ionizes salicylic acid, reducing tubular reabsorption and increasing excretion.
What to do
No action is generally required at usual doses. In high-dose salicylate therapy, monitor response when antacid use 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?
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Other interactions of Calcium
- Calcium + Ceftriaxone Contraindicated
- Acalabrutinib + Calcium Moderate
- Alendronate + Calcium Moderate
- Atazanavir + Calcium Moderate
- Baloxavir marboxil + Calcium Moderate
- Bendroflumethiazide + Calcium Moderate
Frequently asked questions
Can I take Aspirin rectal with Calcium?
MediHelp rates the interaction as minor. Aspirin rectal and Calcium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Alkalinizing antacids raise urinary pH and increase renal excretion of salicylate, which can lower salicylate levels, mainly at high doses. Calcium carbonate has a weaker effect than sodium bicarbonate, so the effect at usual doses is small.
How serious is the interaction between Aspirin rectal and Calcium?
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 action is generally required at usual doses. In high-dose salicylate therapy, monitor response when antacid use changes.
What other medicines interact with Calcium?
MediHelp also lists interactions of Calcium with, for example, Ceftriaxone, Acalabrutinib, Alendronate. The full list is on the Calcium page.
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