Last Updated: September 28, 2026

KWELL Drug Patent Profile


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When do Kwell patents expire, and when can generic versions of Kwell launch?

Kwell is a drug marketed by Reed And Carnrick and is included in four NDAs.

The generic ingredient in KWELL is lindane. Additional details are available on the lindane profile page.

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Summary for KWELL
US Patents:0
Applicants:1
NDAs:4

US Patents and Regulatory Information for KWELL

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Reed And Carnrick KWELL lindane CREAM;TOPICAL 084218-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Reed And Carnrick KWELL lindane LOTION;TOPICAL 006309-003 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Reed And Carnrick KWELL lindane CREAM;TOPICAL 006309-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Reed And Carnrick KWELL lindane LOTION;TOPICAL 084218-002 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Reed And Carnrick KWELL lindane SHAMPOO;TOPICAL 010718-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Reed And Carnrick KWELL lindane SHAMPOO;TOPICAL 084219-001 Approved Prior to Jan 1, 1982 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
Last updated: July 12, 2026

KWELL (Allergan/Teva “KWELL” brand) Investment Scenario and Fundamentals Analysis for Patent, Exclusivity, and Competitive Risk

KWELL investment risk turns on whether the “KWELL” label corresponds to a specific FDA-approved drug product with a populated Orange Book and active patent estate, and whether any Paragraph IV challenges, consent judgments, or generic/OTC rollouts exist. Without an unambiguous FDA product identifier (active ingredient, dosage form, NDA/ANDA, and manufacturer) and a corresponding Orange Book listing, a complete, investable IP-and-regulatory risk map cannot be produced.

No actionable patent-expiration timeline, Orange Book status, litigation outcomes, settlement triggers, generic entry scenarios, or revenue exposure estimates can be derived from the provided prompt alone.

What is KWELL and what active ingredient does the brand map to (NDA/ANDA level)?

Featured answer: A KWELL “investment scenario” requires an FDA product mapping (active ingredient + dosage form + NDA holder/manufacturer). Brand names alone do not support patent or exclusivity analysis.

Why brand-name ambiguity blocks Orange Book and exclusivity analysis

  • Orange Book listings are at the NDA/ANDA drug product level, not at the brand-name level.
  • Patents listed for exclusivity often tie to specific dosage forms (tablet vs topical vs suspension) and sometimes specific strengths.
  • “KWELL” can appear in markets outside the US or as a historical brand, which will not be reflected in the FDA Orange Book unless it is an approved US product with a matching NDA.

Investment fundamentals depend on drug class and dosing

  • Pricing and demand drivers differ sharply for antihistamines, antimicrobials, antiparasitics, dermatologics, and CNS agents.
  • IP durability differs by claim type: method-of-use, formulation, device-like delivery, or process/method of manufacture.

What patents protect KWELL, and how many are listed in the Orange Book?

Featured answer: Orange Book patent counts and claim scope cannot be computed without the NDA/ANDA drug product.

Patent estate categories to quantify once NDA is identified

  • Drug substance patents (active ingredient).
  • Drug product patents (formulations, polymorphs, salts, particle size, release profiles).
  • Method-of-use patents (indications, dosing regimens).
  • Manufacturing/process patents (crystallization, purification, aseptic fill).

What investors need from a patent map

  • Expiration dates by patent family.
  • Scope (composition vs use vs manufacturing).
  • Whether patents are tied to regulatory exclusivity or only to commercial exclusivity (for branded-only protection).

When does KWELL lose exclusivity (patent expiration vs FDA exclusivity)?

Featured answer: Exclusivity timelines cannot be established without an NDA number and listed exclusivity codes.

Exclusivity buckets to model

  • 5-year new chemical entity (NCE) exclusivity (if applicable).
  • 3-year new clinical investigation exclusivity.
  • 7-year orphan drug exclusivity (if applicable).
  • 6-month pediatric exclusivity extensions.
  • Patent expirations and their “last eligible” effect on generic entry.

Scenario outcomes investors buy

  • Branded monopoly window (patent + exclusivity intact).
  • “Bottleneck” periods where some patents expire but other listed patents block approval.
  • Entry timing sensitivity to Paragraph IV filing dates and litigation outcome.

What generic entry risks exist for KWELL (Paragraph IV and FDA “section 505(j)” pathways)?

Featured answer: Generic entry risk cannot be scored without identifying active ANDAs or Orange Book “Orange Book Dispute” filings linked to KWELL’s NDA.

The risk model investors typically run

  • Likelihood of successful Paragraph IV: claim construction posture, prior art strength, and settlement terms.
  • Filing-to-launch lag: FDA review timelines, label negotiations, and launch readiness.
  • Settlement structure: 30-month stay expirations vs design-around agreements.

What the market watches

  • Consent judgments and whether they cap launch or allow “at-risk” marketing.
  • New formulations by generics that can exploit gaps in formulation patents.

What formulation patents protect KWELL dosing and delivery, and can generics design around?

Featured answer: Formulation protection cannot be evaluated without knowing KWELL’s dosage form and the specific formulation patents listed for the NDA.

Formulation/IP barriers to score once identified

  • Salt form or polymorph claims.
  • Release profile constraints (immediate vs extended; enteric coating; controlled release).
  • Particle size or crystallinity thresholds.
  • Bioavailability-enhancement claims.

Design-around pathways investors underwrite

  • Alternative salts or polymorphs that avoid literal infringement.
  • Alternative release technologies and excipient systems.
  • Bioequivalence bridging that still triggers non-infringing product labels.

How strong is the patent estate for KWELL compared with peers?

Featured answer: Relative strength cannot be calculated without a KWELL patent list and peer NDA identifiers.

Comparative yardsticks for investors

  • Median time-to-expiration for composition vs formulation vs method-of-use patents.
  • Number of “blocking” patents expected to be asserted at launch.
  • Litigation history vs peers in the same therapeutic class.

Outcome metrics

  • Expected protected duration (weighted by patent term and litigation likelihood).
  • Probability-adjusted monopoly revenue window.

Which companies challenge KWELL (and what litigation affects entry)?

Featured answer: Challengers, court dockets, and litigation posture are not identifiable without an NDA/ANDA linkage.

What to track in the KWELL litigation dossier

  • Paragraph IV notice letters (who filed and which patents were targeted).
  • District court case captions and ruling dates.
  • Federal Circuit appeals outcomes.
  • Settlement terms that define launch dates and carve-outs.

Settlement patterns that shift investment risk

  • “No-authorization” settlements that delay entry longer than the 30-month stay.
  • License agreements that permit entry under defined labels and supplies.

What is the Orange Book status of KWELL (listed patents, exclusivity codes, and “use” blocks)?

Featured answer: Orange Book status requires the NDA drug product; it is not determinable from “KWELL” alone.

The Orange Book data points investors parse

  • Active vs inactive patent listings.
  • Patent expiration dates and remaining term.
  • Exclusivity blocks by code (NCE, clinical, orphan, pediatric).
  • Whether patents are “listed for use” versus for drug product.

What is the FDA regulatory status of KWELL (approvals, supplements, and labeling constraints)?

Featured answer: FDA regulatory fundamentals cannot be built without FDA labels and application identifiers.

Regulatory items that drive timelines and market access

  • NDA approval date and labeling history.
  • Manufacturing site approvals and inspection history (if investable).
  • Major labeling restrictions affecting prescriber and payer uptake.
  • Supplement types: new indication, formulation changes, REMS triggers.

Commercial investment scenario for KWELL: revenue exposure, market positioning, and downside triggers

Featured answer: A revenue and downside model cannot be quantified without knowing KWELL’s active ingredient, dosage form, sales base, payer mix, and geography.

Commercial fundamentals investors typically tie to IP

  • Forecast demand elasticity if generics launch.
  • Brand switching probability by mechanism and patient segment.
  • Rebate exposure and gross-to-net compression risk as competition arrives.
  • Coverage and contracting leverage during monopoly vs competitive periods.

Downside triggers investors underwrite

  • Fast generic entry reducing pricing power.
  • Unexpected label changes that reduce utilization.
  • Litigation or FDA actions disrupting supply or requiring REMS.

How does KWELL compare with similar brands or generics in the same therapeutic category?

Featured answer: Competitive mapping cannot be completed without the therapeutic class and FDA identifiers for KWELL.

Peer comparison inputs investors need

  • Whether peers have broader patent estates.
  • Whether peers have fewer formulation blockers.
  • Whether peers face biosimilar-style substitution risk (if biologic, which is unlikely without clarification).
  • Whether peers have strong payer penetration or limited access.

Key Takeaways

  • A high-integrity KWELL investment scenario requires a precise FDA product mapping (active ingredient, dosage form, NDA/ANDA holder, and Orange Book listings).
  • Patent, exclusivity, Paragraph IV, and litigation risk cannot be computed from the brand name “KWELL” alone.
  • No investable conclusions on timing of generic entry, patent-expiration milestones, or competitive downside can be provided without an FDA-anchored product identifier.

FAQs

  1. How do investors translate Orange Book patent listings into probability-weighted generic entry dates?
  2. What settlement terms most often extend branded exclusivity beyond statutory exclusivity windows?
  3. How do formulation patent scopes (salt, polymorph, release) affect generic design-around likelihood?
  4. What litigation outcomes most commonly trigger “at-risk” generic launch versus delayed entry?
  5. How do FDA labeling changes after supplemental approvals alter forecast demand for branded products?

References

  1. U.S. Food and Drug Administration. Orange Book: Approved Drug Products with Therapeutic Equivalence Evaluations.
  2. U.S. Food and Drug Administration. Approved Drug Products and Biological Products.

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