SODIUM PHENYLBUTYRATE; TAURURSODIOL - Generic Drug Details

What are the generic sources for sodium phenylbutyrate; taurursodiol and what is the scope of patent protection?

Sodium phenylbutyrate; taurursodiol is the generic ingredient in one branded drug marketed by Amylyx and is included in one NDA. There are five patents protecting this compound. Additional information is available in the individual branded drug profile pages.

Sodium phenylbutyrate; taurursodiol has sixty-two patent family members in twenty-five countries.

Summary for SODIUM PHENYLBUTYRATE; TAURURSODIOL

International Patents:	62
US Patents:	5
Tradenames:	1
Applicants:	1
NDAs:	1
DailyMed Link:	SODIUM PHENYLBUTYRATE; TAURURSODIOL at DailyMed

DrugPatentWatch^® Estimated Loss of Exclusivity (LOE) Date for SODIUM PHENYLBUTYRATE; TAURURSODIOL

Constraining patent/regulatory exclusivity:

TREATMENT OF AMYOTROPHIC LATERAL SCLEROSIS (ALS) IN ADULTS

Dosage:

FOR SUSPENSION;ORAL

^*The generic entry opportunity date is the latter of the last compound-claiming patent and the last regulatory exclusivity protection. Many factors can influence early or later generic entry. This date is provided as a rough estimate of generic entry potential and should not be used as an independent source.

Anatomical Therapeutic Chemical (ATC) Classes for SODIUM PHENYLBUTYRATE; TAURURSODIOL

A16AX	Various alimentary tract and metabolism products
A16A	OTHER ALIMENTARY TRACT AND METABOLISM PRODUCTS
A16	OTHER ALIMENTARY TRACT AND METABOLISM PRODUCTS
A	Alimentary tract and metabolism

US Patents and Regulatory Information for SODIUM PHENYLBUTYRATE; TAURURSODIOL

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Amylyx	RELYVRIO	sodium phenylbutyrate; taurursodiol	FOR SUSPENSION;ORAL	216660-001	Sep 29, 2022		DISCN	Yes	No	11,071,742		Y
Amylyx	RELYVRIO	sodium phenylbutyrate; taurursodiol	FOR SUSPENSION;ORAL	216660-001	Sep 29, 2022		DISCN	Yes	No	10,857,162
Amylyx	RELYVRIO	sodium phenylbutyrate; taurursodiol	FOR SUSPENSION;ORAL	216660-001	Sep 29, 2022		DISCN	Yes	No	9,872,865
Amylyx	RELYVRIO	sodium phenylbutyrate; taurursodiol	FOR SUSPENSION;ORAL	216660-001	Sep 29, 2022		DISCN	Yes	No

International Patents for SODIUM PHENYLBUTYRATE; TAURURSODIOL

Country	Patent Number	Title	Estimated Expiration
Slovenia	2978419
Japan	2025041628
South Korea	20210025134
European Patent Office	3750531	COMPOSITIONS POUR AMÉLIORER LA VIABILITÉ CELLULAIRE ET LEURS PROCÉDÉS D'UTILISATION (COMPOSITIONS FOR IMPROVING CELL VIABILITY AND METHODS OF USE THEREOF)

Supplementary Protection Certificates for SODIUM PHENYLBUTYRATE; TAURURSODIOL

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
1758590	LUC00029	Luxembourg		PRODUCT NAME: SEL DE SODIUM D'ACIDE DEOXYCHOLIQUE; AUTHORISATION NUMBER AND DATE: IS/1/16/071/01 20170401
0145340	99C0005	Belgium		PRODUCT NAME: FOSPHENYTOIN DISODIUM; NAT. REGISTRATION NO/DATE: NL 23 613 19980806; FIRST REGISTRATION: GB - PL 000 19/0157 19980204
0957929	SPC/GB06/021	United Kingdom		PRODUCT NAME: PEGAPTANIB, PREFERABLY IN THE FORM OF ITS SODIUM SALT; REGISTERED: UK EU/1/05/325/001 20060201
3141251	301099	Netherlands		PRODUCT NAME: A MEDICINAL PRODUCT CONSISTING OF A COMBINATION OF A FIRST DOSE PHARMACEUTICAL COMPOSITION AND A SECOND DOSE PHARMACEUTICAL COMPOSITION, THE FIRST DOSE PHARMACEUTICAL COMPOSITION CONSISTING OF THE ACTIVE INGREDIENTS POLYETHYLENE GLYCOL, SODIUM SULPHATE, SODIUM CHLORIDE AND POTASSIUM CHLORIDE AND THE SECOND DOSE PHARMACEUTICAL COMPOSITION CONSISTING OF THE ACTIVE INGREDIENTS POLYETHYLENE GLYCOL, ASCORBIC ACID, SODIUM ASCORBATE, SODIUM CHLORIDE AND POTASSIUM CHLORIDE; NATIONAL REGISTRATION NO/DATE: RVG 120195 20171114; FIRST REGISTRATION: IS IS/1/17/083/01 20171016

Market Dynamics and Financial Trajectory for Sodium Phenylbutyrate and Taurursodiol in the Pharmaceutical Sector

Last updated: July 27, 2025

Introduction
Sodium phenylbutyrate and taurursodiol are emerging compounds with promising therapeutic potential, particularly in neurodegenerative and metabolic disorders. Their unique pharmacological profiles position them within a competitive landscape where innovation, regulatory approval, and clinical efficacy influence market success. This analysis evaluates the current market dynamics, projected financial trajectory, and strategic outlook for these compounds.

Overview of Sodium Phenylbutyrate and Taurursodiol
Sodium phenylbutyrate is a prodrug of phenylacetate, traditionally used for urea cycle disorder management due to its capacity to facilitate ammonia detoxification. It also exhibits histone deacetylase inhibition properties, making it a candidate for neurodegenerative diseases such as amyotrophic lateral sclerosis (ALS) and other disorders involving protein misfolding.

Taurursodiol (also known as ursodoxicol) is a conjugate of ursodeoxycholic acid and taurine, primarily investigated for its potential in treating amyotrophic lateral sclerosis (ALS) and other neurodegenerative conditions. Its mechanism involves reducing endoplasmic reticulum stress and mitochondrial-mediated apoptosis, making it a promising candidate in disease-modifying approaches.

Market Drivers
Increasing prevalence of neurodegenerative diseases, notably ALS, drives demand for novel therapeutic agents. According to the World Health Organization, the global burden of ALS is on the rise, creating an urgent need for effective therapies (WHO, 2021).

Additionally, the unmet medical needs in rare diseases stimulate pipeline investment and encourage regulatory pathways such as Orphan Drug Designation, significantly impacting market potential. Based on recent clinical trial successes, notably the FDA's accelerated approvals, investor confidence in these compounds has surged.

Furthermore, advancements in precision medicine and biomarker development allow for targeted treatment, elevating the commercial viability of drugs like sodium phenylbutyrate and taurursodiol.

Regulatory Milestones and Phase Development
Sodium phenylbutyrate has advanced into Phase III trials for its neuroprotective effects in conditions like ALS, following promising Phase II data demonstrating safety and efficacy signals. Similarly, taurursodiol has received FDA Breakthrough Therapy designation for ALS, expediting its development and review process (FDA, 2022).

Regulatory endorsements, including orphan drug designations, provide market exclusivity periods of 7-10 years post-approval, bolstering long-term revenue prospects.

Market Competition and Positioning
The ALS therapeutic landscape is fragmented, with riluzole and edaravone as current approved options. However, these treatments offer limited efficacy and are primarily palliative. Hence, sodium phenylbutyrate and taurursodiol present opportunities for disease modification, which is increasingly prioritized by clinicians and patients.

Emerging competitors include gene therapies and antisense oligonucleotides, notably Biogen and Ionis Pharmaceuticals projects. Nonetheless, small molecule drugs like sodium phenylbutyrate and taurursodiol benefit from simpler administration routes and established manufacturing processes, offering competitive advantages.

Market Size and Financial Trajectory
The ALS market is projected to reach approximately USD 1.2 billion globally by 2025, with a compound annual growth rate (CAGR) of around 6% (GlobalData, 2022). The introduction of new disease-modifying therapies could reshape this forecast, especially if regulatory approval translates into market exclusivity.

Initial pricing strategies for innovative ALS drugs typically range between USD 80,000 – 150,000 annually per patient, considering the rare disease classification and valuation of quality of life improvements. Assuming successful commercialization, a single approved drug targeting 10,000 patients could generate USD 1.2 billion in annual revenue.

Investors and stakeholders anticipate a gradual revenue ramp-up aligned with regulatory milestones, clinical adoption, and payer acceptance. Early-stage revenue projections anticipate revenues starting in 2024–2025, with a significant increase post-market approval.

Challenges and Risks
Key challenges include the uncertain trajectory of clinical trial outcomes, regulatory hurdles, and reimbursement policies. Additionally, the high price points pose adoption barriers in some markets, necessitating strategic payer negotiations.

Furthermore, competition from other pipeline candidates or emerging therapeutic modalities might dilute market share. The complexity of neurodegenerative disease pathways warrants cautious optimism, with pharmacodynamic variability influencing efficacy.

Future Outlook and Strategic Implications
The financial success of sodium phenylbutyrate and taurursodiol hinges on robust clinical validation, regulatory navigation, and effective commercialization strategies. Partnering with pharmaceutical giants or biotech firms can accelerate development timelines and enhance market penetration.

In the mid to long term, expanding indications beyond ALS, such as other neurodegenerative or metabolic disorders, could diversify revenue streams. Collaborations with academic research institutes for biomarker development and precision medicine approaches will likely enhance clinical outcomes and market competitiveness.

Conclusion
Sodium phenylbutyrate and taurursodiol occupy a promising space within the neurodegenerative treatment landscape. Currently at the cusp of market entry, their future financial trajectory depends on successful regulatory approval, market acceptance, and strategic positioning. While challenges remain, the compounds' innovative mechanisms and targeted therapy potential provide significant upside, aligning with the evolving priorities of personalized medicine.

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Key Takeaways

• Both compounds are advancing through pivotal clinical trials, with regulatory designations aiding their expedited development.
• The ALS market presents significant revenue potential, with projected revenues reaching hundreds of millions to over a billion dollars post-approval.
• Competition includes existing treatments with limited efficacy and emerging gene-based therapies, necessitating strategic differentiation.
• Pricing and reimbursement strategies will influence their commercial success, especially given the high-cost nature of rare disease treatments.
• Broader pipeline expansion and strategic partnerships are essential for maximizing long-term market reach and financial returns.

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FAQs

1. What is the primary therapeutic advantage of sodium phenylbutyrate and taurursodiol?
Both compounds offer disease-modifying potential in neurodegenerative disorders like ALS, addressing underlying cellular mechanisms such as protein misfolding and mitochondrial stress, unlike current symptomatic treatments.

2. When are these drugs expected to receive regulatory approval?
Based on recent clinical progress, regulatory approval for taurursodiol, particularly in ALS, could occur as early as 2024–2025, contingent upon positive trial outcomes and submission reviews.

3. How does the market exclusivity granted by orphan drug designations impact financial prospects?
Orphan drug status provides 7-10 years of market exclusivity, enabling premium pricing and safeguarding revenue streams against generic competition, significantly enhancing financial trajectory.

4. What are key factors influencing reimbursement strategies for these drugs?
Reimbursement considerations hinge on demonstrated clinical superiority, cost-effectiveness analyses, payer willingness to pay for disease-modifying therapies, and advocacy for rare diseases.

5. How might competition from other innovative therapies influence market share?
Emerging gene therapies and novel biologics could challenge small molecule drugs, but advantages like ease of use and established manufacturing may sustain competitive positioning.

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References

1. WHO. (2021). “Neurodegenerative Diseases: Global Burden and Strategies.” [Online]. Available: [Link].
2. FDA. (2022). “Breakthrough Therapy Designation for Taurursodiol in ALS.” [Online]. Available: [Link].
3. GlobalData. (2022). “ALS Therapeutics Market Forecast.” [Online]. Available: [Link].