Drug interactions
Atenolol-chlorthalidone + Tolvaptan
Severity: Moderate
Atenolol-chlorthalidone and Tolvaptan: moderate 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
Tolvaptan causes a large water diuresis and, together with chlorthalidone, can cause volume depletion, hypotension, and electrolyte shifts. Too-rapid correction of sodium is a serious concern when diuretics are combined with tolvaptan.
What this interaction means in plain words
Atenolol-chlorthalidone and Tolvaptan can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Atenolol-chlorthalidone belongs to Cardiovascular; Tolvaptan belongs to Endocrine.
Why it happens
Additive diuretic and volume-depleting effects with combined effects on serum sodium and potassium.
What to do
Monitor serum sodium, potassium, volume status, and blood pressure closely, especially at initiation. Adjust or hold the diuretic if sodium rises too rapidly or hypovolemia develops.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Atenolol-chlorthalidone
Other interactions of Tolvaptan
- Atazanavir + Tolvaptan Contraindicated
- Ceritinib + Tolvaptan Contraindicated
- Cobicistat + Tolvaptan Contraindicated
- Conivaptan + Tolvaptan Contraindicated
- Darunavir + Tolvaptan Contraindicated
- Idelalisib + Tolvaptan Contraindicated
Frequently asked questions
Can I take Atenolol-chlorthalidone with Tolvaptan?
MediHelp rates the interaction as moderate. Atenolol-chlorthalidone and Tolvaptan can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Tolvaptan causes a large water diuresis and, together with chlorthalidone, can cause volume depletion, hypotension, and electrolyte shifts. Too-rapid correction of sodium is a serious concern when diuretics are combined with tolvaptan.
How serious is the interaction between Atenolol-chlorthalidone and Tolvaptan?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum sodium, potassium, volume status, and blood pressure closely, especially at initiation. Adjust or hold the diuretic if sodium rises too rapidly or hypovolemia develops.
What other medicines interact with Atenolol-chlorthalidone?
MediHelp also lists interactions of Atenolol-chlorthalidone with, for example, Acebutolol, Aldesleukin, Amiodarone. The full list is on the Atenolol-chlorthalidone page.
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