Last Updated: November 8, 2026

HYDROCHLOROTHIAZIDE; SPIRONOLACTONE - Generic Drug Details

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What are the generic drug sources for hydrochlorothiazide; spironolactone and what is the scope of patent protection?

Hydrochlorothiazide; spironolactone is the generic ingredient in three branded drugs marketed by Pfizer, Ascot, Chartwell Rx, Mutual Pharm, Mylan, Purepac Pharm, Rubicon Research, Sun Pharm Industries, Superpharm, Watson Labs, Ivax Pharms, Lederle, Parke Davis, Upsher Smith, Usl Pharma, and Vangard, and is included in nineteen NDAs. Additional information is available in the individual branded drug profile pages.

Seven suppliers are listed for this compound.

Summary for HYDROCHLOROTHIAZIDE; SPIRONOLACTONE
Recent Clinical Trials for HYDROCHLOROTHIAZIDE; SPIRONOLACTONE

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)NA
Dutch Kidney FoundationNA
PfizerPHASE1

See all HYDROCHLOROTHIAZIDE; SPIRONOLACTONE clinical trials

Pharmacology for HYDROCHLOROTHIAZIDE; SPIRONOLACTONE
Drug ClassAldosterone Antagonist
Thiazide Diuretic
Mechanism of ActionAldosterone Antagonists
Physiological EffectIncreased Diuresis

US Patents and Regulatory Information for HYDROCHLOROTHIAZIDE; SPIRONOLACTONE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Watson Labs SPIRONOLACTONE W/ HYDROCHLOROTHIAZIDE hydrochlorothiazide; spironolactone TABLET;ORAL 086026-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Purepac Pharm SPIRONOLACTONE AND HYDROCHLOROTHIAZIDE hydrochlorothiazide; spironolactone TABLET;ORAL 087999-001 Nov 6, 1985 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Usl Pharma SPIRONOLACTONE W/ HYDROCHLOROTHIAZIDE hydrochlorothiazide; spironolactone TABLET;ORAL 087651-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Ascot SPIRONOLACTONE AND HYDROCHLOROTHIAZIDE hydrochlorothiazide; spironolactone TABLET;ORAL 088025-001 Nov 23, 1984 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

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