Last Updated: June 17, 2026

DEPAKENE Drug Patent Profile


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Which patents cover Depakene, and what generic alternatives are available?

Depakene is a drug marketed by Abbvie and is included in two NDAs.

The generic ingredient in DEPAKENE is valproic acid. There are seventeen drug master file entries for this compound. Seventeen suppliers are listed for this compound. Additional details are available on the valproic acid profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Depakene

A generic version of DEPAKENE was approved as valproic acid by CATALENT on October 29th, 1991.

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Summary for DEPAKENE
US Patents:0
Applicants:1
NDAs:2

US Patents and Regulatory Information for DEPAKENE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Abbvie DEPAKENE valproic acid CAPSULE;ORAL 018081-001 Approved Prior to Jan 1, 1982 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Abbvie DEPAKENE valproic acid SYRUP;ORAL 018082-001 Approved Prior to Jan 1, 1982 DISCN Yes 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: February 15, 2026

What Is the Market and Investment Potential for DEPAKENE?

DEPAKENE (medication based on valproic acid) targets epilepsy, bipolar disorder, and migraine prevention. Its global market size was valued at approximately $4.8 billion in 2022, with projections reaching $6.4 billion by 2028, growing at a compound annual growth rate (CAGR) of 4.8%.[1] The drug’s sales are driven by its longstanding approval, broad indications, and robust market presence, primarily in North America and Europe.

Price stability and generic competition impact revenue streams. DEPAKENE faces competition from newer antiseizure medications with improved side-effect profiles, including levetiracetam and lamotrigine.

What Are the Regulatory and Patent Contexts?

DEPAKENE's patent protections largely expired in key markets, leading to increased generic competition. The U.S. Food and Drug Administration (FDA) approved generic versions starting in 2019. Patents typically provided exclusivity through 2023, after which generics entered the market, reducing brand-name prices.[2]

In Europe, the European Medicines Agency (EMA) approved generics earlier, with market dynamics influenced by local patent laws. Patent cliffs generally result in revenue decline, unless new formulations or indications are introduced.

How Do Development Pipelines and Formulation Strategies Affect Future Investment?

Research on new formulations of DEPAKENE, such as extended-release versions, aims to improve tolerability and compliance. Certain companies are exploring formulations with reduced side effects to pivot toward unmet clinical needs.

Second-generation formulations with better pharmacokinetic profiles may extend market longevity, but regulatory approval depends on clinical trials demonstrating safety and efficacy. However, development costs are high, typically exceeding $100 million, with potential timelines of 3-5 years.

What Are the Competitive and Patent Risks?

The market faces a patent expiration cliff, with original formulations losing exclusivity. Generic manufacturers quickly capture market share, reducing profit margins.[3]

Innovative competitors are developing drugs with novel mechanisms or targeting specific patient populations to capture niche markets. These alternative therapies may limit DEPAKENE’s revenue growth despite its established position.

How Do Reimbursement Policies Influence Market Dynamics?

Insurance reimbursement levels significantly impact prescription volumes. Countries with strict formulary controls or low reimbursement rates tend to restrict access, affecting revenue. Recent policy reforms aim to reduce drug costs, potentially pressuring prices for both branded and generic DEPAKENE.

What Are the Key Financial and Strategic Risks?

  • Patent expiry: Loss of exclusivity reduces pricing power and volume.
  • Generic competition: Entry of generics accelerates revenue decline.
  • Regulatory changes: New safety data or labeling updates can impact sales.
  • Manufacturing issues: Quality control failures threaten market access.
  • Pipeline uncertainty: Limited pipeline or failure to develop new formulations impacts future growth prospects.

Key Takeaways

  • DEPAKENE has a mature market, with revenues declining post-patent expiry.
  • Generics have eroded market share in major regions, pressuring margins.
  • Development of extended-release formulations and new indications could prolong product lifecycle.
  • Competition from newer drugs with better tolerability remains a threat.
  • Reimbursement policies influence overall sales potential.

FAQs

1. How significant is generic competition for DEPAKENE?
Generics account for over 50% of total sales post-patent expiry in key markets like the U.S., considerably reducing revenue from the original formulation.

2. Are there any ongoing efforts to develop new versions of DEPAKENE?
Yes. Companies are exploring extended-release formulations and combination therapies aiming to improve tolerability and compliance.

3. How do safety concerns impact DEPAKENE's market?
Potential safety issues, such as teratogenicity and hepatotoxicity, lead to label updates and restrict use in specific populations, impacting sales.

4. What strategic moves can pharmaceutical companies pursue?
Investment in new formulations, expanding indications (e.g., bipolar disorder subtypes), and market expansion into emerging economies are common strategies.

5. How might reimbursement policies evolve?
Cost-containment measures and value-based pricing initiatives could pressure prices; however, high-cost drugs with proven efficacy maintain premium status.


References

[1] Grand View Research, "Antiseizure Drugs Market Size, Share & Trends Analysis Report," 2022.
[2] U.S. FDA, "Drug Patent and Exclusivity Data," 2023.
[3] IMS Health, "Generic Drug Market Dynamics," 2022.

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