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Last Updated: March 26, 2026

DORYX Drug Patent Profile


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

Doryx is a drug marketed by Mayne Pharma and Warner Chilcott and is included in three NDAs. There are four patents protecting this drug.

This drug has two patent family members in two countries.

The generic ingredient in DORYX is doxycycline hyclate. There are twenty-eight drug master file entries for this compound. Seventy-six suppliers are listed for this compound. Additional details are available on the doxycycline hyclate profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Doryx

A generic version of DORYX was approved as doxycycline hyclate by STRIDES PHARMA on March 29th, 1982.

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Drug patent expirations by year for DORYX
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Pharmacology for DORYX

US Patents and Regulatory Information for DORYX

DORYX is protected by one US patents.

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Mayne Pharma DORYX doxycycline hyclate CAPSULE, DELAYED RELEASE;ORAL 050582-002 Aug 13, 2001 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-002 May 6, 2005 DISCN Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-006 Dec 19, 2014 DISCN Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Mayne Pharma DORYX MPC doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-007 May 20, 2016 RX Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-003 Jun 20, 2008 DISCN Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Mayne Pharma DORYX MPC doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-008 May 20, 2016 DISCN Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Mayne Pharma DORYX MPC doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-008 May 20, 2016 DISCN Yes No ⤷  Start Trial ⤷  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

Expired US Patents for DORYX

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-006 Dec 19, 2014 ⤷  Start Trial ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-005 Apr 11, 2013 ⤷  Start Trial ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-001 May 6, 2005 ⤷  Start Trial ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-003 Jun 20, 2008 ⤷  Start Trial ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-002 May 6, 2005 ⤷  Start Trial ⤷  Start Trial
Mayne Pharma DORYX doxycycline hyclate TABLET, DELAYED RELEASE;ORAL 050795-004 Apr 11, 2013 ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

Doryx: Market Dynamics and Financial Trajectory

Last updated: February 19, 2026

Doryx (doxycycline hyclate) is an oral tetracycline antibiotic. Its primary indications include the treatment of inflammatory lesions of non-bullous acne vulgaris and certain infections. The drug's market performance is influenced by prescription volume, generic competition, and reimbursement policies. Doryx is manufactured by Medicis Pharmaceutical Corporation, a subsidiary of Valeant Pharmaceuticals International.

What is the Current Market Position of Doryx?

Doryx holds a established position in the antibiotic market, particularly for acne treatment. Its efficacy in addressing inflammatory acne is a key driver of its sustained prescription volume. However, the market is characterized by the availability of numerous generic doxycycline hyclate products, which exert significant pricing pressure.

  • Primary Indication: Treatment of inflammatory lesions of non-bullous acne vulgaris [1].
  • Secondary Indications: Treatment of infections such as Rocky Mountain spotted fever, typhus group, Q fever, and tick fevers caused by Rickettsiae; psittacosis and ornithosis caused by Chlamydiae psittaci; lymphogranuloma venereum and granuloma inguinale caused by Calymmatobacterium granulomatis; and the treatment of infections caused by Escherichia coli, Enterobacter species, Bacteroides species, Streptococcus species, and Staphylococcus species [1].
  • Dosage Forms: Delayed-release tablets [1].
  • Manufacturer: Medicis Pharmaceutical Corporation (a subsidiary of Valeant Pharmaceuticals International) [2].
  • Market Competitors: Numerous generic manufacturers produce doxycycline hyclate formulations [3].

How Has Doryx Performed Financially?

Financial performance data for Doryx as a standalone product is not publicly disclosed by Valeant Pharmaceuticals. The company reports revenue on a consolidated basis, making it challenging to isolate Doryx's specific financial contribution. However, trends in the broader prescription acne market and antibiotic sector provide context.

  • Historical Performance: Prior to Valeant's acquisition of Medicis in 2012, Doryx was a significant revenue generator for Medicis [4].
  • Valeant's Reporting: Valeant has historically focused on reporting segment revenues rather than individual product revenues, particularly for its established brands [5].
  • Market Trends: The overall market for acne treatments has seen shifts with the introduction of new biologic agents and a greater emphasis on cost-effective generic options.
  • Pricing Pressures: The presence of multiple generic competitors has historically led to a decline in the average selling price for doxycycline hyclate products, impacting revenue potential for branded formulations.

What is the Patent Landscape for Doryx?

The original patents protecting Doryx have expired. This has led to the widespread availability of generic versions. The specific formulation of Doryx, such as its delayed-release mechanism, may have had patent protection, but these too have aged.

  • Original Composition of Matter Patent: Expired.
  • Formulation Patents: Patents related to the delayed-release formulation have also expired or are nearing expiration, allowing for generic entry [6].
  • Exclusivity Periods: No current market exclusivity beyond the patent protection period.
  • Generic Entry: Widespread generic availability since the expiration of key patents.

What are the Key Drivers of Doryx Demand?

The demand for Doryx is primarily driven by its established role in treating inflammatory acne, its cost-effectiveness relative to newer therapies, and physician prescribing habits.

  • Acne Treatment Efficacy: Doryx is a well-established treatment for moderate to severe inflammatory acne, offering a proven therapeutic option [1].
  • Cost-Effectiveness: Compared to some newer, more targeted acne therapies, Doryx remains a relatively affordable option, especially generic versions [3].
  • Physician Familiarity: Dermatologists and other healthcare providers have extensive experience prescribing doxycycline, contributing to continued use.
  • Antibiotic Resistance Considerations: While doxycycline is effective, increasing concerns about antibiotic resistance may influence prescribing patterns in favor of non-antibiotic therapies or shorter treatment durations [7].
  • Reimbursement Landscape: Insurance formulary placement and co-payment structures can influence patient access and physician choice.

What are the Potential Challenges and Risks for Doryx?

Several factors pose challenges to Doryx's continued market success, including antibiotic resistance, competition from alternative treatments, and regulatory scrutiny.

  • Antibiotic Resistance: The growing global issue of antibiotic resistance can lead to reduced efficacy of doxycycline and may prompt healthcare providers to limit its use, favoring alternative treatments [7].
  • Competition from Newer Therapies: The development of novel acne treatments, including topical retinoids, benzoyl peroxide combinations, and systemic agents with different mechanisms of action, offers alternatives to doxycycline [8].
  • Generic Erosion: The presence of numerous low-cost generic alternatives significantly limits the pricing power and revenue potential of branded Doryx.
  • Regulatory Scrutiny: Pharmaceutical companies, including Valeant (now Bausch Health Companies), have faced increased regulatory scrutiny regarding drug pricing and marketing practices, which can impact brand strategy and profitability [9].
  • Side Effect Profile: Like all antibiotics, doxycycline has a potential for side effects, including gastrointestinal upset, photosensitivity, and the risk of Clostridioides difficile infection, which can influence patient adherence and physician preference [1].

What is the Competitive Landscape for Doryx?

The competitive landscape for Doryx is multifaceted, encompassing other doxycycline hyclate generics, different classes of acne medications, and even topical treatments.

Direct Competitors (Generic Doxycycline Hyclate):

  • Numerous Manufacturers: Dozens of pharmaceutical companies produce generic doxycycline hyclate tablets and capsules [3]. Examples include Teva Pharmaceuticals, Mylan N.V. (now Viatris), and Sandoz.
  • Price Competition: Intense price competition among generic manufacturers limits profitability for any single entity.

Indirect Competitors (Alternative Acne Treatments):

  • Topical Treatments:
    • Benzoyl Peroxide
    • Topical Retinoids (e.g., tretinoin, adapalene, tazarotene)
    • Topical Antibiotics (e.g., clindamycin, erythromycin)
    • Sulfacetamide
    • Salicylic Acid
  • Systemic Treatments:
    • Isotretinoin (e.g., Accutane - though its use is highly regulated due to side effects)
    • Hormonal agents (e.g., spironolactone, oral contraceptives for females)
    • Other oral antibiotics (e.g., minocycline, azithromycin)
  • Biologics and Newer Agents:
    • Topical fungicides and anti-inflammatory agents are under development and in clinical use.
    • Newer prescription acne medications with novel mechanisms of action.

Comparative Pricing and Market Share:

  • Doryx (Branded): Typically commands a higher price point than generic alternatives.
  • Generic Doxycycline Hyclate: Available at significantly lower price points, often cents per pill.
  • Market Share: While Doryx has a historical presence, generic doxycycline hyclate collectively holds a substantial share of the doxycycline market for acne treatment due to cost [3]. The overall market share for oral antibiotics in acne is also influenced by the increasing adoption of non-antibiotic therapies [8].

What is the Regulatory Status and Outlook?

Doryx is an FDA-approved drug with an established regulatory history. Future regulatory actions would likely focus on labeling updates, post-market surveillance, or potential safety alerts, rather than new drug approvals.

  • FDA Approval: Doryx is approved by the U.S. Food and Drug Administration (FDA) for its indicated uses.
  • Labeling: Prescribing information and patient information are maintained and updated as necessary by the manufacturer.
  • Post-Market Surveillance: Like all approved drugs, Doryx is subject to ongoing safety monitoring by the FDA.
  • Generic Equivalence: Generic versions must demonstrate bioequivalence to the branded product to receive FDA approval.
  • Pricing Scrutiny: The pharmaceutical industry, in general, remains under scrutiny for drug pricing. While Doryx is an older drug, its pricing relative to generics could be a factor in broader industry discussions.

Key Takeaways

Doryx (doxycycline hyclate) is an established oral antibiotic primarily prescribed for inflammatory acne. Its market is characterized by significant generic competition, which suppresses pricing power for the branded product. While Doryx remains a therapeutically relevant option due to its efficacy and cost-effectiveness relative to some newer treatments, it faces challenges from growing antibiotic resistance and the continuous development of alternative acne therapies. The financial trajectory of Doryx is difficult to assess independently due to manufacturer reporting practices, but the overall market trends for oral antibiotics and acne treatments suggest a mature product facing ongoing competitive pressures.

Frequently Asked Questions

  1. What is the typical daily dosage of Doryx for acne treatment? The typical dosage for inflammatory lesions of non-bullous acne vulgaris is 100 mg once or twice daily [1].

  2. Are there any specific warnings associated with taking Doryx? Yes, Doryx carries warnings regarding potential side effects such as photosensitivity, gastrointestinal disturbances, and the risk of tooth discoloration and enamel hypoplasia in children under 8 years old [1]. It also has a boxed warning regarding the potential for serious esophageal adverse reactions.

  3. How does Doryx compare to other oral antibiotics used for acne? Doryx is a tetracycline antibiotic. Other oral antibiotics used for acne include minocycline and azithromycin, which belong to different antibiotic classes. Each has its own efficacy profile, side effect considerations, and potential for contributing to antibiotic resistance [7, 8].

  4. Can Doryx be used to treat infections other than acne? Yes, Doryx is indicated for the treatment of various bacterial infections, including Rocky Mountain spotted fever, typhus, Lyme disease, and infections caused by susceptible strains of Rickettsiae, Chlamydiae, and Mycoplasma [1].

  5. What is the difference between Doryx and generic doxycycline hyclate? Doryx is the branded formulation of doxycycline hyclate, manufactured by Medicis Pharmaceutical Corporation. Generic doxycycline hyclate products are produced by various other manufacturers and must demonstrate bioequivalence to the branded product. While the active ingredient is the same, minor differences in inactive ingredients or the specific delayed-release formulation technology may exist [6].

Citations

[1] Medicis Pharmaceutical Corporation. (2018). Doryx prescribing information. U.S. Food and Drug Administration. [2] Valeant Pharmaceuticals International, Inc. (2012). Valeant Pharmaceuticals Completes Acquisition of Medicis Pharmaceutical Corporation. (Press release). [3] GoodRx. (n.d.). Doxycycline Hyclate Prices, Coupons, and Patient Assistance Programs. Retrieved from https://www.goodrx.com/doxycycline-hyclate [4] Medicis Pharmaceutical Corporation. (2011). Medicis Announces Fourth Quarter and Full Year 2011 Results. (Press release). [5] Bausch Health Companies Inc. (2023). 2022 Annual Report on Form 10-K. U.S. Securities and Exchange Commission. [6] U.S. Food and Drug Administration. (n.d.). Approved Drug Products with Therapeutic Equivalence Evaluations (Orange Book). Retrieved from https://www.accessdata.fda.gov/scripts/cder/ob/ [7] American Academy of Dermatology Association. (n.d.). Antibiotic resistance: A growing problem in acne treatment. Retrieved from https://www.aad.org/public/diseases/acne/treatment/antibiotic-resistance [8] Zaenglein, A. L., Pathy, A. L., Schlosser, B. J., Alikhan, A., Baldwin, H. E., Berson, D. S., ... & Bhutani, T. (2016). Guidelines of care for the management of acne vulgaris. Journal of the American Academy of Dermatology, 74(5), 945-973.e33. [9] U.S. Food and Drug Administration. (2018). Statement from FDA Commissioner Scott Gottlieb, M.D., on the agency's continued efforts to address drug pricing. Retrieved from https://www.fda.gov/news-events/press-announcements/statement-fda-commissioner-scott-gottlieb-md-agencys-continued-efforts-address-drug-pricing

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