Xipamide and Lisinopril: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Xipamide
No brand names on recordLisinopril
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.
Xipamide is a water pill (diuretic) and lisinopril is a blood pressure medicine (an ACE inhibitor). Both lower your blood pressure, and they can work as a team. But when you first start lisinopril while already taking a water pill, your blood pressure can drop more than expected, especially with the first dose. You might feel dizzy or lightheaded when you stand up.
The good news is this is usually temporary and your body adjusts. Your care team can plan for it by adjusting doses and watching you closely at the start. Please talk with your pharmacist or doctor before making any changes yourself, and let them know if you feel faint.
Effect: Additive BP reduction; risk of first-dose hypotension and postural hypotension when an ACE inhibitor (lisinopril) is added to diuretic therapy (xipamide).
Mechanism: Pharmacodynamic. ACE inhibitor-induced vasodilation superimposed on diuretic-related intravascular volume/sodium depletion. Neither agent is enzyme-dependent for activation here.
- Onset: Rapid (first dose)
- Evidence: Theoretical / class-based; more often reported with loop diuretics but applicable to thiazide-like agents
- Management: Consider reducing or holding the diuretic or liberalizing salt intake before initiation; if not feasible, start lisinopril at a lower dose. Monitor BP/orthostatics early. Response is usually transient.
What happens
Reduction of blood pressure
Interaction Deep Dive
For patients already receiving diuretics, adding an ACE inhibitor can lead to an excessive drop in blood pressure3. Cases of severe postural hypotension have been documented when ACE inhibitors are introduced on top of diuretic treatment. This reaction has been seen more frequently with loop diuretics; however, hypotension after the first dose occurs commonly in individuals who are sodium depleted or hypovolemic as a result of diuretics or sodium restriction. In general, this hypotensive effect is temporary6271. To lessen the chance of hypotensive effects, the diuretic can be reduced or stopped, or salt intake can be raised, prior to beginning ACE inhibitor therapy. When such steps cannot be taken, lower the initial dose of the ACE inhibitor3.
Why it happens (mechanism)
Vasodilation and relative intravascular volume depletion
How to manage this interaction
This is a manageable, well-recognized situation, and both medicines can be used together safely with a little planning.
- Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise.
- Your care team may lower or pause the water pill, suggest a bit more salt, or start the lisinopril at a lower dose to ease you in.
- They may check your blood pressure more closely at the beginning.
- Rise slowly from sitting or lying down, and report dizziness, lightheadedness, or fainting.
Ask your pharmacist or prescriber before changing anything on your own.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
2 reports — tap to read
a) A randomized crossover study (N=19) evaluated the simultaneous use of hydrochlorothiazide and enalapril in older patients (62 to 84 years). The results indicated that the pharmacokinetics of enalapril were relatively unaffected by hydrochlorothiazide, whereas there was a significant rise in AUC (0 to 24 hours) and a significant decrease in the renal clearance of enalaprilat 4.
b) When perindopril and hydrochlorothiazide were given together, a minor decrease in peak serum concentrations of perindoprilat was reported, along with a reduction in the proportion of the perindopril dose excreted as perindoprilat in the urine 5.
Common questions
Can I take Xipamide and Lisinopril together?
Adding lisinopril to the water pill xipamide can drop your blood pressure too much at first, causing dizziness, but this is usually short-lived and your care team can manage it by adjusting doses and monitoring you. Rise slowly and report any faintness. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Xipamide and Lisinopril interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "rapid". Effects can appear quickly, often within about 24 hours of combining the drugs.
How is the Xipamide and Lisinopril interaction managed?
This is a manageable, well-recognized situation, and both medicines can be used together safely with a little planning. Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise. Your care team may lower or pause the water pill, suggest a bit more salt, or start the lisinopril at a lower dose to ease you in. They may check your blood pressure more closely at the beginning… 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.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Xipamide or Lisinopril 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 anything you'd monitor while I'm on both?
References (7)
- Vlasses PH, Ferguson RK, & Chatterjee K: Captopril: clinical pharmacology and benefit-to-risk ratio in hypertension and congestive heart failure. Pharmacotherapy 1982; 2:1-17. PubMed
- Gluck Z, Beretta-Piccoli C, & Reubi FC: Long-term effects of captopril on renal function in hypertensive patients. Eur J Clin Pharmacol 1984; 26:315-323. PubMed
- Product Information: QBRELIS(TM) oral solution, lisinopril oral solution. Silvergate Pharmaceuticals (per manufacturer), Greenwood Village, CO, 2016. DailyMed
- Weisser K, Schloos J, Jakob S, et al: The influence of hydrochlorothiazide on the pharmacokinetics of enalapril in elderly patients. Eur J Clin Pharmacol 1992; 43:173-177. PubMed
- Todd PA & Fitton A: Perindopril: a review of its pharmacological properties and therapeutic use in cardiovascular disorders. Drugs 1991; 42:90-114.
- Atkinson AB, Brown JJ, Morton JJ, et al: Captopril in a hyponatremic hypertensive; need for caution initiating therapy (letter). Lancet 1979; 1:557-558.
- Pandhi P, Mondal S, Sharma BK, et al: Low dose captopril alone and in combination with hydrochlorothiazide in treatment of mild to moderate essential hypertension. Int J Clin Pharmacol Ther Toxicol 1986; 24:294-297.
Keep reading about Xipamide
Keep reading about Lisinopril
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