Drug interactions
Atenolol + Calcium
Severity: Minor
Atenolol 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
Calcium salts may reduce the bioavailability of atenolol when taken together orally, potentially weakening heart rate and blood pressure control.
What this interaction means in plain words
Atenolol 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.
Atenolol belongs to Cardiovascular; Calcium belongs to Gastrointestinal Tract.
Why it happens
Reduced intestinal absorption of atenolol, possibly through binding or complex formation with calcium.
What to do
Separate atenolol and calcium supplements by about 2 hours. Monitor blood pressure and heart rate if the pattern of administration 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
Other interactions of Atenolol
- Amifostine + Atenolol Major
- Amiodarone + Atenolol Major
- Atenolol + Atenolol-chlorthalidone Major
- Atenolol + Betaxolol Major
- Atenolol + Bisoprolol Major
- Atenolol + Carvedilol Major
Frequently asked questions
Can I take Atenolol with Calcium?
MediHelp rates the interaction as minor. Atenolol 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. Calcium salts may reduce the bioavailability of atenolol when taken together orally, potentially weakening heart rate and blood pressure control.
How serious is the interaction between Atenolol 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: Separate atenolol and calcium supplements by about 2 hours. Monitor blood pressure and heart rate if the pattern of administration 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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