Epidermolysis Bullosa Simplex

Relief Therapeutics Holding SA / Key word(s): Patent Relief Therapeutics Announces European Patent Office Decision to Grant Patent for RLF-TD011 11.02.2025 / 07:00 CET/CEST Relief Therapeutics Announces European Patent Office Decision to Grant Patent for RLF-TD011 Patent Secures Protection for RLF-TD011 in Epidermolysis Bullosa Wound Treatment GENEVA (FEB. 11, 2025) – RELIEF THERAPEUTICS Holding SA (SIX: RLF, OTCQB: RLFTF, RLFTY) (Relief, or the Company), a biopharmaceutical company committed to delivering innovative treatment options for select specialty, unmet and rare diseases, today announced that the European Patent Office (EPO) has issued a Decision to Grant for its patent application titled “Therapeutic Uses of Oxidizing Hypotonic Acid Solutions.” This patent will protect therapeutic applications of Relief’s proprietary, highly pure hypochlorous acid solutions, including its investigational drug RLF‑TD011 for the treatment of wounds caused by epidermolysis bullosa (EB) in key European countries. The EPO is expected to formally issue the patent on February 26, 2025, under patent number EP 3993811. The patent will remain in effect until 2040, as anticipated by the Notice of Allowance received in October 2024. Corresponding patent applications are under review in other major markets, including the United States and China. RLF-TD011 has previously received orphan drug designation (ODD) from the U.S. Food and Drug Administration (FDA) for the treatment of EB. The Company also intends to seek qualified infectious disease product (QIDP) designation from the FDA. These designations would provide potential incentives such as market exclusivity upon approval. Relief continues to advance the development of its lead program and recently reported positive results from its investigator-initiated clinical trial evaluating RLF-TD011 for the treatment of EB. The Company is currently preparing a pre-IND meeting package for submission to the FDA to finalize the remaining clinical development and regulatory strategy for RLF-TD011. ABOUT RLF-TD011 RLF-TD011 is a highly pure, stabilized hypochlorous acid solution developed using Relief's proprietary TEHCLO™ technology. With strong antimicrobial properties, RLF-TD011 is a sprayable, self-administered solution for targeted wound application while avoiding skin contact and cross-contamination. RLF-TD011 has demonstrated efficacy in accelerating wound closure and reducing infections in certain clinical trials on non-EB wounds. In an investigator-initiated trial (NCT05533866), RLF-TD011 has also shown promising results in infection control and wound healing in EB patients with the most severe forms of the disease. RLF-TD011 aims to address unmet needs in EB care by efficiently controlling infection and inflammation while reducing antibiotic use and easing the intensive, time-consuming wound care routine required by current treatments. ABOUT EPIDERMOLYSIS BULLOSA Epidermolysis bullosa (EB) is a group of rare, inherited connective tissue disorders characterized by extreme skin fragility, leading to blistering and wounds from minor friction or injury. In severe cases, blisters can develop into chronic wounds or form in internal organs such as the mouth or esophagus, leading to painful wounds, recurrent infections, and a deeply impacted quality of life. EB is classified into several major inherited subtypes, each defined by the depth of blister formation within the skin’s layers: epidermolysis bullosa simplex (EBS), dystrophic epidermolysis bullosa (DEB), junctional epidermolysis bullosa (JEB) and Kindler syndrome (KS). Treatment is intensive and includes wound care, infection prevention, and pain management. Approximately 500,000 individuals worldwide are affected by EB. ABOUT RELIEF Relief is a commercial-stage biopharmaceutical company committed to advancing treatment paradigms and delivering improvements in efficacy, safety, and convenience to benefit the lives of patients living with select specialty and rare diseases. Relief’s portfolio offers a balanced mix of marketed, revenue-generating products, proprietary, globally patented TEHCLO™ and Physiomimic™ platform technologies and a targeted clinical development pipeline consisting of risk-mitigated assets focused in three core therapeutic areas: rare skin diseases, rare metabolic disorders, and rare respiratory diseases. In addition, Relief is commercializing several legacy products via licensing and distribution partners. Headquartered in Geneva, Relief is listed on the SIX Swiss Exchange under the symbol RLF and quoted in the U.S. on OTCQB under the symbols RLFTF and RLFTY. For more information, visit www.relieftherapeutics.com. CONTACT: RELIEF THERAPEUTICS Holding SA Jeremy Meinen Chief Financial Officer contact@relieftherapeutics.com DISCLAIMER This press release contains forward-looking statements, which may be identified by words such as "believe," "assume," "expect," "intend," "may," "could," "will," or similar expressions. These statements are based on current plans and assumptions and are subject to risks and uncertainties that could cause actual results, financial condition, performance, or achievements to differ materially from those expressed or implied. Such factors include, but are not limited to, changes in economic conditions, market developments, regulatory changes, competitive dynamics, and other risks or changes in circumstances. This communication is provided as of the date hereof, and Relief undertakes no obligation to update any forward-looking statements contained herein as a result of new information, future events or otherwise. End of Media Release

Relief Therapeutics Announces Positive Final Results of RLF-TD011 Clinical Trial in Epidermolysis Bullosa GENEVA (NOV. 11, 2024) – RELIEF THERAPEUTICS Holding SA (SIX: RLF, OTCQB: RLFTF, RLFTY) (Relief, or the Company), a biopharmaceutical company committed to delivering innovative treatment options for select specialty, unmet and rare diseases, today announced positive final results from its proof-of-concept, investigator-initiated clinical trial evaluating RLF-TD011 for the treatment of epidermolysis bullosa (EB), a rare genetic condition characterized by fragile skin and chronic wounds. The clinical trial evaluated the effects of RLF-TD011 on microbiome diversity in chronic and acute wounds in EB patients, focusing primarily on the most severe forms of the disease (junctional and dystrophic EB). Effective wound healing is crucial for these patients, as their wounds are vulnerable to colonization or infection by pathogenic microorganisms, which can significantly reduce healing rates, increase the risk of sepsis, and lead to other severe complications. In particular, Staphylococcus aureus frequently colonizes EB wounds, where it contributes to chronic inflammation and disrupts the skin microbiome. The trial successfully met its primary endpoint. After eight weeks of treatment, RLF-TD011 led to a 24% decrease in S. aureus relative abundance (p=0.01), which correlated strongly (rho=0.64) with wound size reduction. Overall, 78% of treated wounds closed during the treatment period. Microbiome analysis further showed that RLF-TD011 treatment led to a marked increase in alpha diversity, with an increase in beneficial bacteria within the wound microbiome, effectively reducing S. aureus without disrupting beneficial bacteria. Improvements in microbiome diversity persisted through a four-week post-treatment observation period, evidencing RLF-TD011’s durability effect on the wound environment without signs of regression or exacerbation. “Epidermolysis bullosa is a devastating blistering skin disease that greatly impairs quality of life, particularly from the pain, itch, and risk of infection associated with open wounds. Evidence of reduction in the load of S. aureus and associated improved wound closure highlights the value of use of an antimicrobial spray during wound care,” said Prof. Amy Paller, Principal Investigator of the study and Chair of Dermatology at Northwestern University in Chicago, U.S. “These findings support the potential of RLF-TD011 to meaningfully advance wound care for patients with epidermolysis bullosa,” commented Giorgio Reiner, chief scientific officer of Relief. “The data demonstrates RLF-TD011’s antimicrobial efficacy, which is critical for infection management in chronic EB wounds, as well as its role in promoting wound healing. This is an important milestone in the development of RLF-TD011 toward regulatory approval. With this data in hand, we plan to consult with the U.S. Food and Drug Administration to finalize our development and regulatory plan.” Additional information about this investigator-initiated trial is available at ClinicalTrials.gov (NCT05533866). ABOUT RLF-TD011 RLF-TD011 is a highly pure, stabilized hypochlorous acid solution developed using Relief's proprietary TEHCLO™ technology. With strong antimicrobial properties, RLF-TD011 is a sprayable, self-administered solution for targeted wound application while avoiding skin contact and cross-contamination. RLF-TD011 has shown efficacy in accelerating wound closure and reducing infections in certain clinical trials on non-EB wounds. In preliminary cases, EB patients using RLF-TD011 showed improvements in blistering and tissue repair. RLF-TD011 aims to address an unmet need in EB care by efficiently controlling infection and inflammation while reducing antibiotic use and easing the intensive, time-consuming wound care routine required by current treatments. The U.S. Food and Drug Administration granted it orphan drug designation for EB, and Relief plans to seek qualified infectious disease product (QIDP) designation for extended market exclusivity. ABOUT EPIDERMOLYSIS BULLOSA Epidermolysis bullosa (EB) is a group of rare, inherited connective tissue disorders characterized by extreme skin fragility, leading to blistering and wounds from minor friction or injury. In severe cases, blisters can develop into chronic wounds or form in internal organs such as the mouth or esophagus, leading to painful wounds, recurrent infections, and a deeply impacted quality of life. EB is classified into several major inherited subtypes, each defined by the depth of blister formation within the skin’s layers: epidermolysis bullosa simplex (EBS), dystrophic epidermolysis bullosa (DEB), junctional epidermolysis bullosa (JEB) and Kindler syndrome (KS). Treatment is intensive and includes wound care, infection prevention, and pain management. Approximately 500,000 individuals worldwide are affected by EB. ABOUT RELIEF Relief is a commercial-stage biopharmaceutical company committed to advancing treatment paradigms and delivering improvements in efficacy, safety, and convenience to benefit the lives of patients living with select specialty and rare diseases. Relief’s portfolio offers a balanced mix of marketed, revenue-generating products, proprietary, globally patented TEHCLO™ and Physiomimic™ platform technologies and a targeted clinical development pipeline consisting of risk-mitigated assets focused in three core therapeutic areas: rare skin diseases, rare metabolic disorders, and rare respiratory diseases. In addition, Relief is commercializing several legacy products via licensing and distribution partners. Headquartered in Geneva, Relief is listed on the SIX Swiss Exchange under the symbol RLF and quoted in the U.S. on OTCQB under the symbols RLFTF and RLFTY. For more information, visit www.relieftherapeutics.com. CONTACT: RELIEF THERAPEUTICS Holding SA Jeremy Meinen Chief Financial Officer contact@relieftherapeutics.com DISCLAIMER This press release contains forward-looking statements. Forward-looking statements involve known and unknown risks, uncertainties, including its ability to achieve its corporate, development and commercial goals, and other factors which could cause the actual results, financial condition, performance or achievements of Relief to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. A number of factors, including those described in Relief’s filings with the SIX Swiss Exchange and the U.S. Securities and Exchange Commission (SEC), could adversely affect Relief. Copies of Relief’s filings with the SEC are available on the SEC EDGAR database at www.sec.gov. Relief does not undertake any obligation to update the information contained herein, which speaks only as of this date.

Relief Therapeutics Holding SA / Key word(s): Patent 21-Oct-2024 / 07:00 CET/CEST Release of an ad hoc announcement pursuant to Art. 53 LR The issuer is solely responsible for the content of this announcement. Relief Therapeutics Receives Notice of Allowance for European Patent Covering RLF-TD011 for Epidermolysis Bullosa Wound Treatment GENEVA (OCT. 21, 2024) – RELIEF THERAPEUTICS Holding SA (SIX: RLF, OTCQB: RLFTF, RLFTY) (Relief, or the Company), a biopharmaceutical company committed to delivering innovative treatment options for select specialty, unmet and rare diseases, today reported that the European Patent Office (EPO) has issued a Notice of Allowance under Rule 71(3) EPC for Relief’s patent application No. 20737588.2, titled “Therapeutic Uses of Oxidizing Hypotonic Acid Solutions.” This Notice of Allowance signifies the EPO’s intention to grant a patent covering Relief’s proprietary, highly pure hypochlorous acid solutions, including its investigational drug RLF‑TD011 intended for the treatment of wounds caused by epidermolysis bullosa (EB). Upon completion of the grant procedure, the patent will protect RLF-TD011 in key European countries until 2040. Corresponding applications in other major markets, including the U.S. and China, are currently under review. RLF-TD011 previously received orphan drug designation (ODD) from the U.S. Food and Drug Administration for EB, providing potential incentives such as market exclusivity upon approval. Giorgio Reiner, chief scientific officer of Relief, said: “We are very pleased with this news. The anticipated grant of this patent represents an additional validation of our efforts to develop novel treatments for rare and devastating diseases like EB. This patent will strengthen the protection of our innovation as we continue advancing RLF-TD011’s development, with the ultimate goal of reaching patients who need it most.” ABOUT RLF-TD011 RLF-TD011 is a highly pure, stabilized hypochlorous acid solution developed using Relief's proprietary TEHCLO™ technology. With strong antimicrobial properties, RLF-TD011 is a sprayable, self-administered solution for targeted wound application while avoiding skin contact and cross-contamination. RLF-TD011 has shown efficacy in accelerating wound closure and reducing infections in certain clinical trials on non-EB wounds. In preliminary cases, EB patients using RLF-TD011 showed improvements in blistering and tissue repair. Currently under clinical development, RLF-TD011 has the potential to offer an innovative solution for EB wound care management. The U.S. Food and Drug Administration granted it orphan drug designation for EB, and Relief plans to seek qualified infectious disease product (QIDP) designation for extended market exclusivity. ABOUT EPIDERMOLYSIS BULLOSA Epidermolysis bullosa (EB) is a group of rare, inherited connective tissue disorders characterized by extreme skin fragility, leading to blistering and wounds from minor friction or injury. In severe cases, blisters can develop into chronic wounds or form in internal organs such as the mouth or esophagus. EB affects approximately 1 in 20,000 births in the United States, while the global prevalence of epidermolysis bullosa simplex (EBS) ranges from 1 in 85,000 to 1 in 500,000. ABOUT RELIEF Relief is a commercial-stage biopharmaceutical company committed to advancing treatment paradigms and delivering improvements in efficacy, safety, and convenience to benefit the lives of patients living with select specialty and rare diseases. Relief’s portfolio offers a balanced mix of marketed, revenue-generating products, proprietary, globally patented TEHCLO™ and Physiomimic™ platform technologies and a targeted clinical development pipeline consisting of risk-mitigated assets focused in three core therapeutic areas: rare skin diseases, rare metabolic disorders, and rare respiratory diseases. In addition, Relief is commercializing several legacy products via licensing and distribution partners. Headquartered in Geneva, Relief is listed on the SIX Swiss Exchange under the symbol RLF and quoted in the U.S. on OTCQB under the symbols RLFTF and RLFTY. For more information, visit www.relieftherapeutics.com. CONTACT: RELIEF THERAPEUTICS Holding SA Jeremy Meinen Chief Financial Officer contact@relieftherapeutics.com DISCLAIMER This press release contains forward-looking statements. Forward-looking statements involve known and unknown risks, uncertainties, including its ability to achieve its corporate, development and commercial goals, and other factors which could cause the actual results, financial condition, performance or achievements of Relief to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. A number of factors, including those described in Relief’s filings with the SIX Swiss Exchange and the U.S. Securities and Exchange Commission (SEC), could adversely affect Relief. Copies of Relief’s filings with the SEC are available on the SEC EDGAR database at www.sec.gov. Relief does not undertake any obligation to update the information contained herein, which speaks only as of this date.