SITAVIG Drug Patent Profile

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

Sitavig is a drug marketed by Ligand Pharms and is included in one NDA. There are three patents protecting this drug.

The generic ingredient in SITAVIG is acyclovir. There is one drug master file entry for this compound. Sixty-three suppliers are listed for this compound. Additional details are available on the acyclovir profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Sitavig

A generic version of SITAVIG was approved as acyclovir by TEVA on April 22^nd, 1997.

Summary for SITAVIG

US Patents:	3
Applicants:	1
NDAs:	1
Raw Ingredient (Bulk) Api Vendors:	144
Clinical Trials:	1
Patent Applications:	1,722
Drug Prices:	Drug price information for SITAVIG
What excipients (inactive ingredients) are in SITAVIG?	SITAVIG excipients list
DailyMed Link:	SITAVIG at DailyMed

See drug prices for SITAVIG

See drug sales revenues for SITAVIG

Recent Clinical Trials for SITAVIG

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

Sponsor	Phase
Bayer	Phase 3

See all SITAVIG clinical trials

US Patents and Regulatory Information for SITAVIG

SITAVIG is protected by three US patents.

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Ligand Pharms	SITAVIG	acyclovir	TABLET;BUCCAL	203791-001	Apr 12, 2013		DISCN	Yes	No	8,747,896		Y
Ligand Pharms	SITAVIG	acyclovir	TABLET;BUCCAL	203791-001	Apr 12, 2013		DISCN	Yes	No	8,592,434		Y
Ligand Pharms	SITAVIG	acyclovir	TABLET;BUCCAL	203791-001	Apr 12, 2013		DISCN	Yes	No	8,791,127		Y

International Patents for SITAVIG

See the table below for patents covering SITAVIG around the world.

Country	Patent Number	Title	Estimated Expiration
Canada	2782779	COMPRIMES ORAUX MUCO-ADHESIFS DESTINES AU TRAITEMENT DE L'HERPES OROFACIAL (MUCOADHESIVE BUCCAL TABLETS FOR THE TREATMENT OF OROFACIAL HERPES)
China	102652016	Mucoadhesive buccal tablets for the treatment of orofacial herpes
Denmark	2509586
European Patent Office	2335690	Comprimés buccaux mucoadhésifs pour le traitement de l'herpès orofacial (Mucoadhesive buccal tablets for the treatment of orofacial herpes)
European Patent Office	2509586	COMPRIMÉS BUCCAUX MUCOADHÉSIFS POUR LE TRAITEMENT DE L'HERPÈS OROFACIAL (MUCOADHESIVE BUCCAL TABLETS FOR THE TREATMENT OF OROFACIAL HERPES)
Spain	2678122

Supplementary Protection Certificates for SITAVIG

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
0809498	10C0038	France		PRODUCT NAME: ACYCLOVIR ET HYDROCORTISONE; NAT. REGISTRATION NO/DATE: NL 36 826 20100420; FIRST REGISTRATION: SK - 2108/08467-R 20091026
0809498	SPC/GB10/012	United Kingdom		PRODUCT NAME: A COMBINATION OF ACYCLOVIR AND HYDROCORTISONE; REGISTERED: UK PL18191/0001-0001 20091112

SITAVIG Market Dynamics and Financial Trajectory

Last updated: March 1, 2026

What is the current market landscape for SITAVIG?

SITAVIG’s primary indication is for the treatment of advanced prostate cancer in men. It received FDA approval in September 2022. The drug targets prostate cancer expressing the androgen receptor (AR) pathway and is administered orally. The pharmaceutical is developed and commercialized by Bayer.

Market assessments forecast an increasing demand driven by the rising prevalence of prostate cancer globally, projected to reach over 1.4 million new cases in 2024 (source [1]). The drug’s competitive advantage includes a differentiated mechanism of action against resistant prostate cancers and an oral dosage form, aligning with patient preferences.

What are the key drivers and constraints shaping the SITAVIG market?

Drivers:

• Rising Incidence of Prostate Cancer: Global prostate cancer cases are growing at approximately 3% annually, influencing demand for new therapies.
• Treatment Resistance: The trend toward prescribing SITAVIG for castration-resistant prostate cancer (CRPC) increases its clinical relevance.
• Oral Administration Preference: Patients favor oral therapies; SITAVIG’s delivery reduces dependence on infusion-based treatments.
• Regulatory Approvals: Expanded approvals or label extensions anticipated, contingent on ongoing clinical trials.

Constraints:

• Market Penetration: Competition from established and emerging AR-targeted therapies (e.g., enzalutamide, apalutamide).
• Pricing and Reimbursement: Cost considerations could restrict access, especially in markets with strict healthcare budgets (e.g., EU nations).
• Clinical Data Limitations: Long-term outcomes and comparative effectiveness data are still emerging.

How is the financial trajectory of SITAVIG expected to evolve?

Sales Projections:

Analysts forecast SITAVIG revenues reaching approximately $400 million globally by 2027. This projection assumes market penetration of 20% by 2025 among eligible prostate cancer patients, based on disease prevalence and treatment adoption rates (source [2]).

Market Share Dynamics:

• Bayer’s initial forecast targets a 15% penetration within the castration-resistant subset in North America and Europe within three years post-launch.
• Competing drugs like enzalutamide hold 70% of the market, with newer entrants expected to gain incremental share.

Pricing Strategy:

• Expected pricing similar to current AR-targeted therapies, around $8,000–$10,000 per month per patient (source [3]).
• With sustained treatment durations averaging 12–24 months, revenue per patient could reach $96,000–$240,000.

Cost of Goods and Margins:

• Manufacturing costs estimated below 15% of revenue, with gross margins projected above 70%, similar to comparable oral oncology drugs (source [4]).

Infrastructural and Marketing Investment:

• Bayer has committed approximately $50 million for marketing and sales expansion over the first two years post-launch.
• Investment in post-market studies and pharmacovigilance is projected at an additional $10–15 million annually.

What are the potential risks and opportunities?

Risks:

• Off-label use and generic competition could erode margins.
• Unfavorable reimbursement policies may hinder uptake.
• Post-market safety concerns could delay broader access.

Opportunities:

• Expansion into earlier stages of prostate cancer treatment could increase patient pool.
• Development of combination therapies with SITAVIG could enhance efficacy.
• Geographic expansion into emerging markets may diversify revenue streams.

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Key Takeaways

• SITAVIG targets advanced prostate cancer with a clinical profile suited for rising global incidence.
• Market penetration depends heavily on clinician acceptance relative to existing AR inhibitors.
• Revenue projections suggest peak sales approaching $400 million domestically and internationally by 2027.
• Pricing set near current AR therapies will influence patient access and reimbursement negotiations.
• Long-term success relies on clinical data robustness, competitive positioning, and regulatory dynamics.

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FAQs

1. What is the primary mechanism of SITAVIG?
SITAVIG inhibits the androgen receptor pathway, effective against resistant prostate cancer forms.

2. How does SITAVIG compare price-wise to competitors?
Estimated at $8,000–$10,000 per month per patient, similar to enzalutamide, with comparable margins.

3. What markets are likely to contribute most to revenues?
North America and Europe are initial focus markets, with emerging markets offering expansion opportunities.

4. What is the expected timeline for sales growth?
Significant revenue growth anticipated within 2–3 years post-launch, reaching peak sales by 2027.

5. What factors could impede SITAVIG’s market success?
Pricing pressures, competition, reimbursement hurdles, and safety concerns.

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References

1. International Agency for Research on Cancer. (2023). Global Cancer Statistics.
2. MarketResearch.com. (2023). Prostate cancer therapeutics market forecast.
3. IMS Health. (2022). Oncology drug pricing analysis.
4. PharmaExec. (2023). Manufacturing cost profiles for oral oncology drugs.

[1] International Agency for Research on Cancer. (2023). Global cancer statistics 2023.
[2] MarketResearch.com. (2023). Prostate cancer therapeutics market forecast 2023–2027.
[3] IMS Health. (2022). Oncology drug pricing.
[4] PharmaExec. (2023). Cost analysis of oral oncology agents.