Drug interactions
Chlorthalidone + Toremifene
Severity: Moderate
Chlorthalidone and Toremifene: 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
Toremifene can cause hypercalcemia, particularly in patients with bone metastases, and thiazides decrease urinary calcium excretion. Together they can raise the risk of significant hypercalcemia.
What this interaction means in plain words
Chlorthalidone and Toremifene 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.
Chlorthalidone belongs to Cardiovascular; Toremifene belongs to Endocrine.
Why it happens
Thiazide-reduced renal calcium excretion adds to toremifene-associated hypercalcemia.
What to do
Monitor serum calcium during the first weeks of toremifene therapy. Stop or replace the thiazide with another antihypertensive if hypercalcemia 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 Chlorthalidone
Other interactions of Toremifene
- Amiodarone + Toremifene Contraindicated
- Dronedarone + Toremifene Contraindicated
- Nilotinib + Toremifene Contraindicated
- Pimozide + Toremifene Contraindicated
- Quinidine + Toremifene Contraindicated
- Ribociclib + Toremifene Contraindicated
Frequently asked questions
Can I take Chlorthalidone with Toremifene?
MediHelp rates the interaction as moderate. Chlorthalidone and Toremifene 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. Toremifene can cause hypercalcemia, particularly in patients with bone metastases, and thiazides decrease urinary calcium excretion. Together they can raise the risk of significant hypercalcemia.
How serious is the interaction between Chlorthalidone and Toremifene?
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 calcium during the first weeks of toremifene therapy. Stop or replace the thiazide with another antihypertensive if hypercalcemia develops.
What other medicines interact with Chlorthalidone?
MediHelp also lists interactions of Chlorthalidone with, for example, Amifostine, Atenolol-chlorthalidone, Candesartan-hydrochlorothiazide. The full list is on the Chlorthalidone page.
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