Indapamide and Acetaminophen And Codeine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jun 30, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Acetaminophen And Codeine
Indapamide
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Here's what's going on. Indapamide is a water pill (diuretic) that helps your body get rid of extra fluid and lowers blood pressure. The codeine in your acetaminophen-codeine can cause your body to hold on to more water by triggering a hormone that keeps fluid in. That means your water pill may not work quite as well while you take both.
The good news: this is a theoretical concern, and it's very manageable. Your care team can watch your blood pressure and how well the water pill is working, and adjust your dose if needed. Keep taking both as prescribed, and let your pharmacist or doctor know if you notice swelling or rising blood pressure.
Interaction: Codeine (a CYP2D6-activated opioid prodrug, though the effect here is opioid-mediated rather than metabolic) may reduce the diuretic and antihypertensive efficacy of indapamide.
- Mechanism: Opioid-induced release of antidiuretic hormone (ADH/vasopressin), promoting water retention and opposing diuresis.
- Direction: Reduced diuretic effect (PD antagonism).
- Evidence: Theoretical; onset unspecified.
- Severity on file: Major.
- Management: Monitor diuresis, edema, weight, and blood pressure. Indapamide dose may be titrated upward if diminished response is observed. Individualize.
What happens
Reduced diuretic efficacy
Interaction Deep Dive
When codeine is taken together with diuretics, it can trigger the release of anti-diuretic hormone, which may lessen how well the diuretics work. Watch patients for indications of reduced diuresis and/or changes in blood pressure, and raise the diuretic dose as required1.
Why it happens (mechanism)
Increased opioid-mediated release of antidiuretic hormone
How to manage this interaction
You can keep taking both as prescribed. The main thing here is watching how well the water pill is working.
- Your care team may monitor you more closely for signs the diuretic is less effective, such as swelling, weight gain, or higher blood pressure readings.
- If needed, your indapamide dose may be adjusted and individualized by your team to keep it working well.
- Tell your pharmacist or prescriber if you notice new swelling in your legs or ankles, sudden weight gain, or blood pressure that seems to be creeping up.
Do not start, stop, or change either medication on your own.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Indapamide and Acetaminophen And Codeine together?
The codeine in your acetaminophen-codeine may make indapamide work a little less well by causing water retention, so watch for swelling or rising blood pressure and let your care team adjust the water pill if needed. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Indapamide and Acetaminophen And Codeine interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Indapamide and Acetaminophen And Codeine interaction managed?
You can keep taking both as prescribed. The main thing here is watching how well the water pill is working. Your care team may monitor you more closely for signs the diuretic is less effective, such as swelling, weight gain, or higher blood pressure readings. If needed, your indapamide dose may be adjusted and individualized by your team to keep it working well. Tell your pharmacist or prescriber… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Indapamide or Acetaminophen And Codeine need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (1)
- Product Information: CARISOPRODOL, ASPIRIN, CODEINE PHOSPHATE oral tablets, carisoprodol, aspirin, codeine phosphate oral tablets. Ingenus Pharmaceuticals LLC (per DailyMed), Orlando, FL, 2021. DailyMed
Keep reading about Acetaminophen And Codeine
Keep reading about Indapamide
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