Last Updated: June 26, 2026

ATACAND Drug Patent Profile


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When do Atacand patents expire, and what generic alternatives are available?

Atacand is a drug marketed by Ani Pharms and is included in two NDAs.

The generic ingredient in ATACAND is candesartan cilexetil; hydrochlorothiazide. There are twenty-two drug master file entries for this compound. Five suppliers are listed for this compound. Additional details are available on the candesartan cilexetil; hydrochlorothiazide profile page.

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Summary for ATACAND
Recent Clinical Trials for ATACAND

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

SponsorPhase
The University of Texas Health Science Center, HoustonEarly Phase 1
AgoneX Biopharmaceuticals, Inc.Phase 2
BioHealthonomics Inc.Phase 2

See all ATACAND clinical trials

Pharmacology for ATACAND
Paragraph IV (Patent) Challenges for ATACAND
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
ATACAND Tablets candesartan cilexetil 4 mg, 8 mg, 16 mg and 32 mg 020838 1 2006-12-22

US Patents and Regulatory Information for ATACAND

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Ani Pharms ATACAND candesartan cilexetil TABLET;ORAL 020838-001 Jun 4, 1998 AB RX Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Ani Pharms ATACAND HCT candesartan cilexetil; hydrochlorothiazide TABLET;ORAL 021093-003 May 16, 2008 AB RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Ani Pharms ATACAND candesartan cilexetil TABLET;ORAL 020838-004 Jun 4, 1998 AB RX Yes Yes ⤷  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

Expired US Patents for ATACAND

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Ani Pharms ATACAND candesartan cilexetil TABLET;ORAL 020838-002 Jun 4, 1998 ⤷  Start Trial ⤷  Start Trial
Ani Pharms ATACAND candesartan cilexetil TABLET;ORAL 020838-003 Jun 4, 1998 ⤷  Start Trial ⤷  Start Trial
Ani Pharms ATACAND candesartan cilexetil TABLET;ORAL 020838-001 Jun 4, 1998 ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

Supplementary Protection Certificates for ATACAND

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
0459136 SPC/GB97/018 United Kingdom ⤷  Start Trial PRODUCT NAME: CANDESARTAN CILEXETIL OPTIONALLY IN THE FORM OF A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF.; REGISTERED: UK PL0017/0383 19970429; UK PL0017/0384 19970429; UK PL0017/0385 19970429; UK PL0017/0391 19970429; UK PL15561/0003 19970429; UK PL15661/0001 19970429; UK PL15661/0002 19970429; UK PL15661/0004 19970429
0459136 C970044 Netherlands ⤷  Start Trial PRODUCT NAME: CANDESARTAN, DESGENST IN DE VORM VAN EEN FARMACEUTISCH AAN- VAARDBAAR ZOUT OF VAN DE 1-(CYCLOHEXYLOXYCARBONYLOXY) ETHYLESTE R, IN HET BIJZONDER CILEXETILI CANDESARTANAS, DESGEWENST IN DE VORM VAN EEN FARMACEUTISCH AANVAARDBAAR ZOUT; NAT. REGISTRATION NO/DATE: RVG 21703 - RVG 21706 19971013; FIRST REGISTRATION: GB PL 15661/0001 - PL 15661/0004 19970429
0459136 98C0016 Belgium ⤷  Start Trial PRODUCT NAME: CANDESARTAN CILEXETIL; NAT. REGISTRATION NO/DATE: 212 IS 236 F3 19980119; FIRST REGISTRATION: GB PL 15661/0001 19970429
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description
Last updated: June 18, 2026

ATACAND market dynamics and financial trajectory (candesartan cilexetil): exclusivity, competitive pressures, and revenue outlook

ATACAND (candesartan cilexetil) faces patent-driven competition risk across key markets as older, branded exclusivity has largely run its course. Demand is sustained by long-lived use in hypertension and heart failure, but price erosion accelerates as generics expand and payer formularies tighten. Financial trajectory in recent years is mainly shaped by (1) patent estate maturity, (2) generic penetration and contracting outcomes, and (3) country-by-country launch timing for authorized and non-authorized generic supply.

What is ATACAND (candesartan cilexetil) used for and how does that shape market demand?

Indications that anchor baseline demand ATACAND (candesartan cilexetil) is used for:

  • Hypertension
  • Heart failure (including reduced ejection fraction in label histories by region)
  • Post-myocardial infarction populations in some geographies/label versions

Why those indications matter commercially

  • Long-duration therapy: hypertension and chronic heart failure support persistent patient cohorts and repeat prescribing.
  • Class role: as an angiotensin II receptor blocker (ARB), candesartan competes on efficacy-equivalence and tolerability against other ARBs (valsartan, losartan, irbesartan) and combination regimens with thiazide diuretics or calcium channel blockers.
  • Substitution dynamics: once generic availability is established, switching is typically driven by price and formulary placement rather than novel clinical differentiation.

Which patient segments drive prescription intensity for ATACAND?

  • Chronic hypertension: broad primary-care penetration and use in multi-drug regimens.
  • Chronic heart failure: specialist and guideline-driven adoption; continuation rates support stable volume but do not prevent price pressure after generic entry.
  • Elderly and comorbidity cohorts: ARB positioning tends to sustain demand even as payer cost controls intensify.

What is the Orange Book and patent landscape for ATACAND (candesartan cilexetil) in the US?

Featured-snippet answer ATACAND in the US has had extensive branded-to-generic transition, with exclusivity and listed patents historically concentrated on formulation, manufacturing, and device-related improvements rather than a single perpetual compound right.

How the US patent regime typically influences ATACAND pricing

  • Once composition-of-matter and core use rights expire, generics enter.
  • Remaining listed patents, if any, can delay specific generic launches by triggering litigation or by blocking certain variants.
  • After multiple generic approvals, price erosion becomes the dominant factor.

How many patent listings typically affect ARB brands like ATACAND?

  • For legacy small molecules, patent estates usually split into:
    • Original composition and/or early process patents (most expire first)
    • Formulation and polymorph/process improvements (often expire later)
    • Method-of-use and combination regimen patents (can extend competition timing in narrow slices)

Which jurisdictions carry the largest timing risk for ARB brands like ATACAND?

  • US: generic entry timing and Paragraph IV leverage.
  • EU: national marketing authorizations and patent enforcement differences across member states.
  • UK: patent litigation posture differs post-Brexit but remains enforceable under national rules.
  • Major ex-US markets often drive overall revenue more than patent technicalities, especially once generics are established.

When does ATACAND lose exclusivity and what does the generic timeline look like?

Featured-snippet answer ATACAND’s brand exclusivity has largely lapsed, and current market dynamics are governed primarily by generic availability, contracting, and competitive substitution among ARBs rather than pending brand exclusivity.

Generic entry mechanics that drive financial trajectory

  • First generic entrant tends to trigger the steepest price decline.
  • Subsequent entrants reduce unit pricing further but can stabilize supply and reduce volatility.
  • Authorized generics and supply agreements can soften near-term erosion but cap long-term margin recovery for the originator.

What are the main drivers of post-exclusivity revenue decline?

  • Contracting: rebates and payer preferred status heavily favor lower-cost SKUs.
  • Wholesale ASP compression: generics reduce average selling prices.
  • Mix shifts: brand loses first-line share and becomes a second-choice option in many formularies.

How many generic manufacturers compete with ATACAND and what does that mean for pricing?

Featured-snippet answer Competition is typically broad for established ARBs, and the presence of multiple generic manufacturers accelerates price convergence toward lower-cost benchmarks.

Commercial consequences of multi-generic supply

  • ASP compression: branded revenue declines as average net prices fall.
  • Tender pricing: hospitals and integrated delivery networks select lowest-cost suppliers.
  • Margin pressure: even if volume holds, net revenue per tablet declines.

Which ARB competitors matter most for ATACAND’s market share?

  • Valsartan
  • Losartan
  • Irbesartan
  • Telmisartan
  • Olmesartan These drugs compete through class equivalence and payer preference stacking across therapeutic classes.

What patent litigation affects ATACAND and generic entry risk?

Featured-snippet answer For established small-molecule ARBs, litigation tends to occur around the earliest generic launches and any late-formulation or method-of-use patents still listed at the time.

Typical litigation patterns in ARB generics

  • Paragraph IV certifications alleging non-infringement or invalidity of listed patents.
  • Settlement agreements that include market carve-outs, delayed entry dates, or “authorized generic” terms.
  • Post-marketing patent challenges focusing on specific formulation variants rather than core substance.

How settlement terms can change the financial trajectory

  • A delayed entry for one generic cohort can temporarily extend brand revenue.
  • An authorized generic under settlement can depress pricing faster once authorized supply begins.
  • Scope matters: if a settlement covers only a narrow subset, later entrants still reduce pricing quickly.

What formulations are protected for ATACAND and do delivery or strength variants change exclusivity?

Featured-snippet answer ATACAND’s competitive position is not usually determined by novel delivery-system IP at this stage; instead, strength-specific and formulation-specific patents can influence which generic strengths launch at particular times.

Formulation/IP hotspots that can affect generic timing

  • Solid-state form and polymorph issues (if claimed)
  • Tablet composition, coatings, or excipient systems
  • Manufacturing process improvements (scale, yield, impurity profile)
  • Combination-product patents if marketed in specific geographies

Why strength-level competition matters

  • Generic manufacturers can select the easiest-to-launch strengths first.
  • Payer formularies may switch strength-by-strength based on contracted pricing.

How does ATACAND compare with other ARBs on market durability and financial performance?

Featured-snippet answer ATACAND competes in a mature, substitutable ARB class. Financial durability typically depends more on regional share and contracting outcomes than on unique clinical differentiation.

Where ATACAND tends to hold steady versus lose share

  • Hold steady when:
    • Brand legacy share is entrenched in primary-care cohorts.
    • Regional payer systems prefer candesartan-based regimens.
  • Lose share when:
    • Formularies prefer a lower-cost ARB based on tender outcomes.
    • Generic pricing for competing ARBs drops faster.

Key comparative commercial metrics to monitor

  • Market share (units and prescriptions) by strength
  • Net price (post-rebates) and ASP by channel
  • Contract penetration in major GPOs and PBMs
  • Switching rates to lower-cost ARBs and ARB combinations

What is ATACAND’s regulatory status (FDA approval pathway) and how does it affect competition?

Featured-snippet answer ATACAND is an approved small-molecule drug; its regulatory status affects generic competitiveness through ANDA eligibility once patents and exclusivity barriers are cleared.

Regulatory and market effects

  • Once ANDAs are approved, availability rises and price drops.
  • If any brand-listed patents block certain ANDA approvals, entry can be delayed for specific filings.
  • Post-marketing safety updates can influence switching behavior, but generally do not reverse generic competition after mature entry.

How strong is the patent estate for ATACAND, and can it still block generic entry?

Featured-snippet answer The patent estate for an older ARB like candesartan cilexetil is typically not a structural barrier to broad generic entry, but it can create pockets of delay if late-expiring formulation or method-of-use patents remain enforceable at the time of specific generic filings.

What “strong” usually means in practice for late-stage ARBs

  • Enforceable patents at relevant expiration dates in target jurisdictions
  • Evidence that specific generic products fall within claim scope
  • Procedural ability to obtain injunctions or settlements that delay launch

What generic entry risks exist for ATACAND in the current cycle?

Featured-snippet answer The remaining generic entry risk is primarily “breadth risk,” meaning incremental erosion from late-arriving strengths, channel-specific entrants, and price competition rather than a single decisive launch event.

Risk vectors

  • New ANDAs for additional strengths and packaging
  • Increased competition from authorized generics (directly or via settlement structures)
  • Price cuts after tender cycles and payer formulary changes

How does ATACAND’s commercial trajectory vary by geography?

Featured-snippet answer ATACAND experiences similar competitive mechanics in most developed markets: branded pricing collapses after generic penetration. Differences arise from:

  • Local patent litigation timing
  • Number of generic entrants
  • Tender/bidding structure and reimbursement rules
  • Authorized generic presence

Geography-by-geography dynamics to track

  • US: ORANGE-BOOK-driven generic entry timing and Paragraph IV waves.
  • EU/UK: national enforcement and local generics market density.
  • Emerging markets: licensing and distribution relationships plus local regulatory approval speed.

What revenue exposure does ATACAND have to ARB class competition and price erosion?

Featured-snippet answer Revenue exposure is high to price erosion because ATACAND’s prescribing is highly substitutable after generic entry. The originator’s financial performance depends on maintaining relative share through contracting and availability rather than on IP-driven exclusivity.

Revenue levers

  • Volume retention: sustaining prescriptions after generic switch.
  • Net pricing: offsetting unit declines with improved mix or contract positioning.
  • Inventory and supply: preventing channel fill issues that accelerate switching.

Revenue headwinds that usually dominate post-branded phase

  • Unit price decreases driven by generic oversupply
  • PBM and hospital tender-driven reimbursement caps
  • Channel inventory normalization after generic launches

Key Takeaways

  • ATACAND (candesartan cilexetil) operates in a mature ARB category where long-term indications sustain volume but generics drive margin compression.
  • The financial trajectory post-exclusivity is mainly determined by generic breadth, contracting outcomes, and multi-entrant price convergence.
  • Patent estate effects typically shift from blocking early generic launches to creating localized timing pockets for specific strengths or formulations.
  • Competitive risk is broad across the ARB class, with revenue exposure tied to payer preferred status and tender outcomes rather than unique delivery or class-defining IP.

FAQs

  1. Which ARBs most directly substitute for ATACAND in formularies?
    Valsartan, losartan, irbesartan, telmisartan, and olmesartan.

  2. Does ATACAND’s strength or formulation version influence generic launch timing?
    Yes, generic entrants often launch first where formulation/packaging and strength-specific barriers are lowest.

  3. How do Paragraph IV challenges typically affect the timeline for an established ARB like ATACAND?
    They can delay specific generic approvals if listed patents are asserted and litigation or settlements postpone launch.

  4. What matters more for ATACAND profitability today: volume or price?
    Price, because net revenue is heavily pressured once multiple generics are established and payer contracting tightens.

  5. Where should market participants focus to track ATACAND’s next revenue swing?
    Market share by strength, net price trends (post-rebates), and PBM/hospital tender outcomes.

References

  1. U.S. Food and Drug Administration. Orange Book: Approved Drug Products with Therapeutic Equivalence Evaluations. (FDA database). https://www.accessdata.fda.gov/scripts/cder/daf/
  2. FDA. Approved Drug Products with Therapeutic Equivalence Evaluations (ANDA and listed patent records). (FDA database). https://www.accessdata.fda.gov/scripts/cder/daf/
  3. FDA. Drug Approval Reports and labeling for candesartan cilexetil products. (FDA). https://www.fda.gov/

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