Drug interactions
Calcitriol + Captopril-hydrochlorothiazide
Severity: Moderate
Calcitriol and Captopril-hydrochlorothiazide: 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
Hydrochlorothiazide reduces urinary calcium excretion, while calcitriol increases calcium absorption, so together they can cause hypercalcemia. The risk is greater with oral calcitriol and renal impairment, and lower with topical use.
What this interaction means in plain words
Calcitriol and Captopril-hydrochlorothiazide 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.
Calcitriol belongs to Musculoskeletal; Captopril-hydrochlorothiazide belongs to Cardiovascular.
Why it happens
Additive effects on serum calcium from reduced renal calcium excretion (thiazide) and increased intestinal absorption (calcitriol).
What to do
Monitor serum calcium 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 Captopril-hydrochlorothiazide
- Aliskiren + Captopril-hydrochlorothiazide Contraindicated
- Captopril-hydrochlorothiazide + Dofetilide Contraindicated
- Captopril-hydrochlorothiazide + Sacubitril / valsartan Contraindicated
- Aceclofenac + Captopril-hydrochlorothiazide Major
- Aldesleukin + Captopril-hydrochlorothiazide Major
- Amifostine + Captopril-hydrochlorothiazide Major
Other interactions of Calcitriol
- Amlodipine-hydrochlorothiazide-valsartan + Calcitriol Moderate
- Amlodipine-olmesartan-hydrochlorothiazide + Calcitriol Moderate
- Amobarbital + Calcitriol Moderate
- Apalutamide + Calcitriol Moderate
- Atazanavir + Calcitriol Moderate
- Atenolol-chlorthalidone + Calcitriol Moderate
Frequently asked questions
Can I take Calcitriol with Captopril-hydrochlorothiazide?
MediHelp rates the interaction as moderate. Calcitriol and Captopril-hydrochlorothiazide 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. Hydrochlorothiazide reduces urinary calcium excretion, while calcitriol increases calcium absorption, so together they can cause hypercalcemia. The risk is greater with oral calcitriol and renal impairment, and lower with topical use.
How serious is the interaction between Calcitriol and Captopril-hydrochlorothiazide?
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 regularly, especially with oral calcitriol, and reduce the calcitriol dose if hypercalcemia develops.
What other medicines interact with Captopril-hydrochlorothiazide?
MediHelp also lists interactions of Captopril-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Sacubitril / valsartan. The full list is on the Captopril-hydrochlorothiazide page.
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