Drug interactions
Atenolol-chlorthalidone + Calcitriol
Severity: Moderate
Atenolol-chlorthalidone and Calcitriol: 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
Chlorthalidone reduces urinary calcium excretion while calcitriol increases calcium absorption, so together they can raise serum calcium. Hypercalcemia is more likely with oral calcitriol or high doses. Topical calcitriol has little systemic absorption.
What this interaction means in plain words
Atenolol-chlorthalidone and Calcitriol 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; Calcitriol belongs to Musculoskeletal.
Why it happens
Thiazide-induced renal calcium retention adds to vitamin D-mediated intestinal calcium absorption.
What to do
Monitor serum calcium and renal function regularly, especially with oral calcitriol, and reduce the calcitriol dose 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 Atenolol-chlorthalidone
Other interactions of Calcitriol
- Amlodipine-hydrochlorothiazide-valsartan + Calcitriol Moderate
- Amlodipine-olmesartan-hydrochlorothiazide + Calcitriol Moderate
- Amobarbital + Calcitriol Moderate
- Apalutamide + Calcitriol Moderate
- Atazanavir + Calcitriol Moderate
- Azilsartan-chlorthalidone + Calcitriol Moderate
Frequently asked questions
Can I take Atenolol-chlorthalidone with Calcitriol?
MediHelp rates the interaction as moderate. Atenolol-chlorthalidone and Calcitriol 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 reduces urinary calcium excretion while calcitriol increases calcium absorption, so together they can raise serum calcium. Hypercalcemia is more likely with oral calcitriol or high doses. Topical calcitriol has little systemic absorption.
How serious is the interaction between Atenolol-chlorthalidone and Calcitriol?
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 and renal function regularly, especially with oral calcitriol, and reduce the calcitriol dose if hypercalcemia 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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