Garlic Extract and Losartan/Hydrochlorothiazide: what the published research says
PubMed indexes 3 records that name Garlic Extract and Losartan/Hydrochlorothiazide together, either in the title or in an interaction, co-administration, or pharmacokinetic context. Each one is listed below with its study design and, where the abstract states one, the authors’ own conclusion, quoted and linked. This page reports that literature. It does not tell you whether to combine them.
Every statement below is attributed to a named, dated, linked source.
This page lists published research relevant to Garlic Extract and Losartan/Hydrochlorothiazide. It deliberately does not state whether the combination is safe, whether it interacts, in which direction, at what dose, or how far apart to take them.
A study appearing here is not proof that an interaction exists. Two substances can be named together in a paper that never tested them in combination, and a source listed as background may cover only one of them.
Findings are quoted from each abstract as the authors wrote them. NutriStack has not re-analysed, pooled, or reconciled them, and they may disagree with each other.
NutriStack’s own interaction assessment for this pair is not published here. It has not completed qualified-human clinical review, so it is withheld from search. See the publication gate.
Nothing here is medical advice. Decisions about prescription medication and supplements belong with your prescriber or pharmacist, who can see your full regimen.
The research
3 studies naming Garlic Extract and Losartan/Hydrochlorothiazide.
Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.
Journal of natural medicines · 2011 · PMID 20821270
Animal study
“Moreover, moderate dose of garlic was more effective than low dose, while a high dose of garlic was least effective in correcting electrocardiographic changes. Thus it is concluded that garlic in moderate dose (250 mg/kg) with added HCTZ possesses synergistic cardioprotective and antihypertensive properties against fructose- and isoproterenol-induced toxicities.”
Names both Garlic Extract and Losartan/Hydrochlorothiazide in its title.
“It was concluded that careful addition of garlic in moderate doses might result in beneficial effect during treatment of hypertension in patients with myocardial stress as garlic causes substantial fall in excretion of potassium when compared to HCTZ alone treatment in rats. This could be important in reducing the dose of HCTZ to achieve enhanced therapeutic effect with minimal adverse effect.”
Names both Garlic Extract and Losartan/Hydrochlorothiazide in its title.
Indian journal of physiology and pharmacology · 2009 · PMID 20112816
Animal study
“Adding HCTZ improved biochemical, antioxidant and histological status of myocardium during myocardial damage. Since no toxic effects were observed, HCTZ may safely be used to improve GH therapy.”
Names both Garlic Extract and Losartan/Hydrochlorothiazide in its title.
Limitations
What this evidence cannot tell you.
Search-based evidence indexes have real limits, and it is worth being explicit about them:
Selection. These records were found by searching PubMed titles and abstracts for both substance names alongside interaction and pharmacokinetic terms. Relevant work that phrases things differently, or is not indexed in PubMed, will be missing.
No effect size. The quoted conclusions are the authors’ words about their own study. We have not extracted effect direction or magnitude, and a single study’s conclusion is not a consensus.
Population mismatch. Findings in healthy volunteers, animals, or a specific patient group may not transfer to you, your dose, or your formulation.
Absence is not safety. Few published studies means the combination is under-studied, which is not the same as established as safe.
Nearby evidence
Other pairs with published research.
Pages covering Garlic Extract or Losartan/Hydrochlorothiazide alongside a different substance.
NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Garlic Extract, Losartan/Hydrochlorothiazide, and several hundred other substances.
The checker is a research and organisation tool, not a clinical decision aid, and its per-pair assessments are excluded from search until they pass claim-level review.
NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.
