Last Updated: May 11, 2026

ELCYS Drug Patent Profile


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Which patents cover Elcys, and when can generic versions of Elcys launch?

Elcys is a drug marketed by Exela Pharma and is included in one NDA. There are sixteen patents protecting this drug and one Paragraph IV challenge.

The generic ingredient in ELCYS is cysteine hydrochloride. There are fourteen drug master file entries for this compound. Two suppliers are listed for this compound. Additional details are available on the cysteine hydrochloride profile page.

DrugPatentWatch® Generic Entry Outlook for Elcys

There have been five patent litigation cases involving the patents protecting this drug, indicating strong interest in generic launch. Recent data indicate that 63% of patent challenges are decided in favor of the generic patent challenger and that 54% of successful patent challengers promptly launch generic drugs.

There is one tentative approval for the generic drug (cysteine hydrochloride), which indicates the potential for near-term generic launch.

Indicators of Generic Entry

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Paragraph IV (Patent) Challenges for ELCYS
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
ELCYS Injection cysteine hydrochloride 500 mg/10 mL 210660 1 2019-12-10

US Patents and Regulatory Information for ELCYS

ELCYS is protected by sixteen US patents.

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Exela Pharma ELCYS cysteine hydrochloride SOLUTION;INTRAVENOUS 210660-001 Apr 16, 2019 RX Yes Yes 11,510,942 ⤷  Start Trial Y ⤷  Start Trial
Exela Pharma ELCYS cysteine hydrochloride SOLUTION;INTRAVENOUS 210660-001 Apr 16, 2019 RX Yes Yes 10,905,713 ⤷  Start Trial Y ⤷  Start Trial
Exela Pharma ELCYS cysteine hydrochloride SOLUTION;INTRAVENOUS 210660-001 Apr 16, 2019 RX Yes Yes 10,583,155 ⤷  Start Trial Y ⤷  Start Trial
Exela Pharma ELCYS cysteine hydrochloride SOLUTION;INTRAVENOUS 210660-001 Apr 16, 2019 RX Yes Yes 11,679,125 ⤷  Start Trial Y ⤷  Start Trial
Exela Pharma ELCYS cysteine hydrochloride SOLUTION;INTRAVENOUS 210660-001 Apr 16, 2019 RX Yes Yes 10,905,714 ⤷  Start Trial Y ⤷  Start Trial
Exela Pharma ELCYS cysteine hydrochloride SOLUTION;INTRAVENOUS 210660-001 Apr 16, 2019 RX Yes Yes 11,510,941 ⤷  Start Trial Y ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

ELCYS Market Analysis and Financial Projection

Last updated: April 23, 2026

ELCYS: Market dynamics and financial trajectory

ELCYS is a brand name for L-cysteine products. Public, drug-specific commercial data (brand-level revenue, pricing history, market share, and profitability) is not available in the sources cited below, so the market dynamics and financial trajectory below are anchored to the underlying chemical’s category behavior (L-cysteine and related amino-acid supply/demand) and the structural economics that drive price and volume in this niche.

What is ELCYS in the market?

ELCYS is marketed as an L-cysteine drug/ingredient product (amino acid). L-cysteine sits inside the broader amino acid and specialty nutrient ecosystem, where buyers include pharmaceutical manufacturers, supplement formulators, and industrial users (depending on grade). In those markets, commercialization is typically governed by:

  • Commodity-to-specialty pricing (grade, purity, and regulatory status drive premiums)
  • Supply concentration and fermentation capacity (capacity additions and disruptions move price)
  • Downstream demand tied to end-use (healthcare formulations, nutrition, and processing demand)

How does market demand typically behave for L-cysteine products?

Demand for L-cysteine generally tracks four drivers:

  1. Food and nutrition consumption cycles (supplements and functional nutrition)
  2. Pharmaceutical formulation needs (stabilizers/precursors and excipient-adjacent uses)
  3. Process and industrial utilization (depending on intended grade)
  4. Substitution and supply substitutes (other amino acids and pathway-adjusted formulations)

Because ELCYS is an L-cysteine product, the commercial pattern usually looks like:

  • Volume stability with pricing variability
  • Margin sensitivity to raw material and production yield
  • Repricing events tied to supply tightness or excess inventory

What pricing and supply dynamics matter most?

L-cysteine pricing in global markets is influenced by:

  • Fermentation capacity utilization and yield (manufacturing economics)
  • Input costs (notably feedstock and energy where applicable)
  • Regulatory/quality compliance costs (pharma-grade vs food-grade spreads)
  • China-driven supply shifts (major producer geography for many amino acids)

The net effect is that financial trajectory for an L-cysteine brand like ELCYS tends to show:

  • Revenue growth that is volume-led (new approvals, tenders, or formulary uptake)
  • Profit swings driven by contract repricing, inventory cycles, and grade mix

How do procurement cycles translate into revenue timing?

Most pharma and specialty amino-acid procurement is contract-based with:

  • Tenders and framework agreements
  • Quarterly releases aligned to manufacturing schedules
  • Safety-stock ordering when supply signals turn tight

For ELCYS, this often creates a financial rhythm of:

  • Front-loaded shipments during contract starts
  • Smoothing later under stable supply terms
  • Discrete repricing steps when market conditions shift

How does competition typically affect ELCYS’s financial trajectory?

ELCYS competes in an L-cysteine category where the competitive set usually falls into:

  • Same-ingredient generics (same chemical entity, different brand)
  • Alternative suppliers with comparable grade
  • Regional distributors with different logistics and compliance costs

Category competition most often impacts:

  • Net price (discounting during supplier competition)
  • Gross margin (increased COGS pressure or less favorable contract terms)
  • Customer retention (switching costs depend on regulatory dossiers and qualification status)

In practical terms, brands in this space face:

  • Higher volatility in realized price than in branded small molecules
  • Lower absolute marketing intensity than prescription specialties, since the product is a chemical entity with procurement-driven buying

What do capacity and global supply signals imply for ELCYS?

Global amino-acid markets frequently show:

  • Rapid supply expansions after capacity additions
  • Price compression during surplus
  • Price spikes during outages or demand acceleration

These cycles typically translate to:

  • Working capital sensitivity for brand owners or distributors (inventory builds in surplus periods)
  • Margin contraction when pricing resets downward
  • Margin rebound when supply tightens and contracts reprice upward

What does the financial trajectory likely look like?

Without brand-level filings, the most decision-relevant “trajectory” can be expressed as scenario mechanics used by pharmaceutical chemical brands:

1) Revenue path

  • Stable baseline revenue from recurring qualification and repeat purchasing
  • Upside from tenders and switching when suppliers expand distribution or win contracts
  • Downside in surplus years when customers rebid and switch away

2) Gross margin path

  • Most sensitive to realized pricing (contract repricing)
  • Also sensitive to FX, logistics, and grade mix (pharma-grade premiums vs lower-grade sales)
  • More stable when contracts lock price bands and reduce repricing risk

3) Cash flow path

  • Inventory and receivables drive variability
  • Surplus periods incentivize discounting and may increase inventory
  • Tight supply periods can increase cash conversion through faster sell-through but raise replenishment costs

Where do ELCYS financial outcomes usually show up on P&Ls?

For a product like ELCYS, business outcomes typically map to:

  • Net sales: dominated by contract volumes and realized price per grade
  • COGS: dominated by manufacturing cost, input costs, and compliance overhead
  • R&D: often limited vs small-molecule drug development (unless specific formulation or clinical differentiation exists)
  • Marketing/Sales: lower than high-visibility prescription brands; more procurement-focused selling

What market signals should investors track for ELCYS?

1) Price indices and spread between grades

Investors should monitor:

  • L-cysteine spot and contract price trend
  • Pharma-grade premiums versus general amino-acid grades
  • Input-cost movement (where available)

2) Supply disruptions and capacity utilization

Key signals:

  • Capacity expansions and startup schedules in major producing geographies
  • Unit outages or demand-driven capacity reallocation
  • Import/export policy shifts that change availability

3) Buyer qualification and tender outcomes

Monitor:

  • Framework renewals and tender award cycles
  • New customer onboarding (qualification time drives lead indicators)
  • Switching signals, which tend to cluster around bid cycles

How does ELCYS compare to typical branded small-molecule trajectories?

ELCYS behaves like a category chemical with brand differentiation primarily at the level of:

  • Quality and compliance grade
  • Distribution reach
  • Contracting terms

Compared with a patent-based prescription drug, an L-cysteine brand typically shows:

  • Less dependence on blockbuster-style launch ramp
  • More dependence on procurement cycles and grade economics
  • Price sensitivity that can be higher and more frequent due to commodity-style competition

Key Takeaways

  • ELCYS is an L-cysteine product, so its market dynamics follow amino-acid supply-demand cycles more than prescription-drug launch dynamics.
  • The financial trajectory is usually volume-led and margin-driven by realized contract price and grade mix.
  • Investors should track price indices, grade premium spreads, production capacity utilization, and tender/qualification outcomes, since these determine realized net sales and gross margin.

FAQs

1) Is ELCYS protected by patent exclusivity like standard small-molecule drugs?

ELCYS is an L-cysteine brand; category chemicals often face different IP and market-entry dynamics than novel small-molecule therapeutics. Exclusivity, where present, depends on specific patents tied to formulation, process, or regulatory filings.

2) What drives ELCYS financial volatility the most?

Realized pricing in contract cycles and grade mix, driven by global supply conditions, typically drives volatility more than brand-level demand swings.

3) Does ELCYS revenue scale like a blockbuster product?

No. Category amino-acid brands typically scale through procurement volumes, tenders, and customer qualification rather than prescription-style diffusion.

4) Where do profits usually come from for ELCYS?

Gross margin typically depends on how pharma-grade (or compliance-grade) pricing compares with manufacturing and regulatory compliance costs.

5) What are the fastest leading indicators of ELCYS market changes?

Spot/contract price direction, tender outcomes, and supplier availability signals (capacity utilization and disruptions) tend to lead reported revenue changes.

References

[1] US Patent and Trademark Office. (n.d.). Patent Public Search. https://ppubs.uspto.gov/
[2] European Patent Office. (n.d.). Espacenet. https://worldwide.espacenet.com/
[3] UN Comtrade. (n.d.). International trade statistics database. https://comtradeplus.un.org/
[4] FAO. (n.d.). Food and nutrition-related statistical resources. https://www.fao.org/

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