NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Updated July 13, 2026

Hydrochlorothiazide

Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026

Hydrochlorothiazide (HCTZ) is a thiazide diuretic and one of the most commonly prescribed antihypertensives. It is often used in combination with other agents including ACE inhibitors, ARBs, and potassium-sparing diuretics. Despite widespread use, recent evidence suggests chlorthalidone may offer superior 24-hour BP control.

Evidence tier
Strong
Indexed sources
10 2012–2024
Interactions
0
Depletes
5 nutrients
Read the sources → Compare profiles
Publication status

Exploratory record, not a reviewed medical publication.

See the editorial and medical-review policies for the publication gate.

This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.

In short

What the research says.

A quick, data-only summary. The full evidence, dosing, and sources are below.

Hydrochlorothiazide (HCTZ) is a thiazide diuretic and one of the most commonly prescribed antihypertensives. NutriStack rates the supporting evidence as strong. Common adult dosing is 12.5–50 mg once daily (as prescribed by your physician), though a prescriber sets the actual dose. With long-term use it can deplete potassium, magnesium, zinc. This profile indexes 10 sources.

What it's good for
  • Effective blood pressure reduction7,2
  • Reduces risk of stroke and cardiovascular events in hypertensive patients5,3
  • Low cost and widely available
  • Synergistic with ACE inhibitors and ARBs
What to watch for
  • Hypokalemia
  • Hyponatremia
  • Hyperuricemia and gout flares
  • Anuria
  • Hypersensitivity to HCTZ or sulfonamide-derived drugs

The bottom line

Evidence rating strong. Most-documented uses: effective blood pressure reduction, reduces risk of stroke and cardiovascular events in hypertensive patients, low cost and widely available. 10 sources indexed (2012–2024), with 0 interaction records on file.

The science

How it works, mechanistically.

Core mechanism

Inhibits the sodium-chloride cotransporter (NCC) in the distal convoluted tubule of the nephron. Reduces sodium and chloride reabsorption, increasing urine output and reducing plasma volume. Long-term blood pressure reduction is thought to involve decreased peripheral vascular resistance via mechanisms not fully understood.

Class
Thiazide Diuretic
Dosing

Dosing & protocol.

Common range
12.5–50 mg once daily (as prescribed by your physician)
Recommended form
Oral tablet or capsule

Can be taken with or without food; take in the morning to avoid nocturia1

Depletions

What it depletes.

Nutrients this medication can lower over time, and what to replace.

Potassium

Moderate

Thiazide diuresis can increase distal sodium delivery and urinary potassium secretion, so potassium should be monitored rather than self-repleted.

Replace Clinician-guided potassium repletion if serum potassium is lowMonitor Serum potassium + kidney functionOnset Can develop within days to weeks

Magnesium

Moderate

Thiazides can increase urinary magnesium losses and contribute to low magnesium status.

Replace Magnesium GlycinateMonitor Serum magnesium or RBC magnesiumOnset Usually over days to weeks

Zinc

Mild

Chronic thiazide use can increase urinary zinc excretion and gradually lower zinc balance.

Replace Zinc PicolinateMonitor Serum zincOnset Usually over weeks to months

Sodium

Moderate

Thiazides are a common medication cause of hyponatremia, especially in older adults.

Monitor Serum sodiumOnset Can develop within days to weeks

CoQ10

Mild

Beta-blocker and diuretic therapy are associated with lower CoQ10 status in some long-term users, likely through increased oxidative demand and reduced tissue levels.

Replace Coenzyme Q10Monitor Plasma CoQ10Onset Usually over months of chronic use

Full Hydrochlorothiazide depletion and interaction guide →

Safety

Full safety detail.

Side effects

  • Hypokalemia
  • Hyponatremia
  • Hyperuricemia and gout flares
  • Hyperglycemia
  • Hyperlipidemia
  • Dizziness and orthostatic hypotension
  • Photosensitivity
  • Erectile dysfunction

Contraindications

  • Anuria
  • Hypersensitivity to HCTZ or sulfonamide-derived drugs
  • Severe renal impairment (eGFR <30 mL/min, limited efficacy)
  • Hypokalemia or hyponatremia (uncorrected)
Sources

Sources, by evidence tier.

Numbered references. Citations throughout the page link here.

Meta-analyses & systematic reviews

5

Reference material

5
FAQ

Common questions.

Quick answers about Hydrochlorothiazide, drawn from the data on this page.

What is Hydrochlorothiazide?

Hydrochlorothiazide (HCTZ) is a thiazide diuretic and one of the most commonly prescribed antihypertensives. It is often used in combination with other agents including ACE inhibitors, ARBs, and potassium-sparing diuretics. Despite widespread use, recent evidence suggests chlorthalidone may offer superior 24-hour BP control.

What is Hydrochlorothiazide used for?

Commonly cited benefits of Hydrochlorothiazide include: Effective blood pressure reduction; Reduces risk of stroke and cardiovascular events in hypertensive patients; Low cost and widely available; Synergistic with ACE inhibitors and ARBs. NutriStack rates the overall evidence as strong.

What is a typical dose of Hydrochlorothiazide?

A typical adult dose of Hydrochlorothiazide is 12.5–50 mg once daily (as prescribed by your physician). The commonly recommended form is Oral tablet or capsule. These are general ranges, not personalized advice; confirm the right dose with a clinician.

What are the side effects of Hydrochlorothiazide?

Reported side effects include hypokalemia, hyponatremia, hyperuricemia and gout flares, hyperglycemia, hyperlipidemia, dizziness and orthostatic hypotension. This is educational information; check with a healthcare professional before use.

How strong is the evidence for Hydrochlorothiazide?

NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.

Use this with your stack

Hydrochlorothiazide in NutriStack.

Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.

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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.