UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16

under the Securities Exchange Act of 1934

For the Month of August, 2022

Commission File Number: 001-41174

RELIEF THERAPEUTICS Holding SA

(Exact name of Registrant as specified in its charter)

Not Applicable

(Translation of registrant's name into English)

Switzerland

(Jurisdiction of incorporation or organization)

Avenue de Sécheron 15

1202 Genève

Switzerland

Tel: +41 22 545 11 16

(Address of principal executive offices)

Indicate by check mark if the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1) ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7) ☐

INFORMATION CONTAINED IN THIS REPORT ON FORM 6-K

On July 28, 2022, Relief Therapeutics Holding SA (the "Company") issued a press release entitled "Acer Therapeutics and Relief Therapeutics Announce ACER-001 IND Submission for the Treatment of Maple Syrup Urine Disease," a copy of which press release is attached to this Form 6-K as Exhibit 99.1.

On August 3, 2022, the Company issued a press release entitled "Relief Therapeutics Announces Promising Initial Stability Data on a New Formulation of RLF-100® (Aviptadil)," a copy of which press release is attached to this Form 6-K as Exhibit 99.2.

INDEX TO EXHIBITS

Exhibit No.	Description
99.1	Press Release dated July 28, 2022
99.2	Press Release dated August 3, 2022

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

RELIEF THERAPEUTICS Holding SA

By: /s/ Jack Weinstein

Jack Weinstein

Chief Financial Officer

Dated: August 4, 2022

Exhibit 99.1

Ad hoc announcement pursuant toArt. 53 LR

Acer Therapeutics and Relief Therapeutics AnnounceFDA Acceptance for Review of NDA Resubmission for ACER-001 for Treatment of UCDs

Prescription Drug User Fee Act (PDUFA) target actiondate set for January 15, 2023

NEWTON, MA and GENEVA, SWITZERLAND – July 28, 2022 – Acer Therapeutics Inc. (Nasdaq: ACER) (Acer) and its collaboration partner, RELIEF THERAPEUTICS Holding SA (SIX: RLF, OTCQB: RLFTF, RLFTY) (Relief), today announced the U.S. Food and Drug Administration (FDA) has accepted for review Acer’s resubmitted New Drug Application (NDA) for ACER-001 (sodium phenylbutyrate) for oral suspension for the treatment of patients with urea cycle disorders (UCDs). The FDA designated the NDA as a Class 2 resubmission and set a Prescription Drug User Fee Act (PDUFA) target action date of January 15, 2023.

“We are very pleased to receive confirmation that the FDA is commencing its review of our NDA resubmission,” said Chris Schelling, Founder & Chief Executive Officer of Acer. “We have notified the FDA that our third-party contract packaging manufacturer is ready for inspection and are hopeful that the Agency’s review can be completed in a timely manner. While NDA approval is not assured, if approval is received, we are prepared to execute on our comprehensive launch plan and provide a new treatment option to underserved UCDs patients. These efforts reinforce our ongoing commitment to developing new and differentiated treatment options for those affected by rare diseases.”

In June 2022, as previously announced, the FDA issued Acer a Complete Response Letter (CRL) stating that satisfactory inspection of Acer’s third-party contract packaging manufacturer is required before the ACER-001 NDA may be approved. Acer notified the FDA in the NDA resubmission that the third-party contract packaging manufacturer is ready for inspection. The FDA did not cite any other approvability issues in the CRL pertaining to the NDA, nor request any additional clinical or pharmacokinetic studies be conducted prior to FDA action. Additional existing nonclinical information as requested by the FDA in the CRL but identified as “not an approvability issue”, as well as labeling and other required updates to the original NDA, were provided in the resubmission of the NDA.

There can be no assurance that ACER-001 will be approved for any indication.

About ACER-001

ACER-001 (sodium phenylbutyrate) is being developed for the treatment of various inborn errors of metabolism, including UCDs and Maple Syrup Urine Disease (MSUD). ACER-001 is a nitrogen-binding agent in development for use as adjunctive therapy in the chronic management of patients with UCDs involving deficiencies of carbamylphosphate synthetase (CPS), ornithine transcarbamylase (OTC), or argininosuccinic acid synthetase (AS). ACER-001 is a polymer coated formulation that, when taken within 5 minutes, helps prevent the coating from dissolving. ACER-001 has been granted orphan drug designation by the FDA for MSUD. ACER-001 is an investigational product candidate which has not been approved by FDA, the European Medicines Agency (EMA), or any other regulatory authority.

About Acer Therapeutics Inc.

Acer is a pharmaceutical company focused on the acquisition, development and commercialization of therapies for serious rare and life-threatening diseases with significant unmet medical needs. Acer’s pipeline includes four investigational programs: ACER-001 (sodium phenylbutyrate) for treatment of various inborn errors of metabolism, including urea cycle disorders (UCDs) and Maple Syrup Urine Disease (MSUD); ACER-801 (osanetant) for treatment of induced Vasomotor Symptoms (iVMS); EDSIVO™ (celiprolol) for treatment of vascular Ehlers-Danlos syndrome (vEDS) in patients with a confirmed type III collagen (COL3A1) mutation; and ACER-2820 (emetine), a host-directed therapy against a variety of viruses, including cytomegalovirus, Zika, dengue, Ebola and COVID-19. For more information, visit www.acertx.com.

About RELIEF THERAPEUTICS Holding SA

Relief focuses primarily on clinical-stage programs based on molecules with a history of clinical testing and use in human patients or a strong scientific rationale. Relief has a Collaboration and License Agreement with Acer Therapeutics for the worldwide development and commercialization of ACER-001 (sodium phenylbutyrate) for the treatment of various inborn errors of metabolism, including UCDs and Maple Syrup Urine Disease (MSUD). Relief also continues to study aviptadil for several possible lung related conditions. Finally, Relief's 2021 acquisitions of APR Applied Pharma Research SA and AdVita Lifescience GmbH brought to Relief a diverse pipeline of marketed and development-stage programs.

RELIEF THERAPEUTICS Holding SA 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 Follow Relief on LinkedIn.

Acer Forward-Looking Statements

This press release contains “forward-looking statements” that involve substantial risks and uncertainties for purposes of the safe harbor provided by the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, included in this press release are forward-looking statements. Examples of such statements include, but are not limited to, statements about our plans if NDA approval is received, including our launch plan and intent to provide a new treatment option to underserved UCDs patients, as well as statements regarding our ongoing commitment to developing new and differentiated treatment options for those affected by rare diseases. Our pipeline products are under investigation and their safety and efficacy have not been established and there is no guarantee that any of our investigational products in development will receive health authority approval or become commercially available for the uses being investigated. We may not actually achieve the plans, carry out the intentions or meet the expectations or projections disclosed in the forward-looking statements and you should not place undue reliance on these forward-looking statements. Such statements are based on management’s current expectations and involve risks and uncertainties. Actual results and performance could differ materially from those projected in the forward-looking statements as a result of many factors, including, without limitation, risks related to the drug development and the regulatory approval process, including the timing and requirements of regulatory actions. We disclaim any intent or obligation to update these forward-looking statements to reflect events or circumstances that exist after the date on which they were made. You should review additional disclosures we make in our filings with the Securities and Exchange Commission, including our Annual Report on Form 10-K and Quarterly Reports on Form 10-Q. You may access these documents for no charge at http://www.sec.gov.

Relief Forward-Looking Statements

This communication expressly or implicitly contains certain forward-looking statements concerning RELIEF THERAPEUTICS Holding SA and its businesses. Such statements involve certain known and unknown risks, uncertainties and other factors, including (i) whether the FDA will approve Acer’s NDA for ACER-001, (ii) whether RELIEF THERAPEUTICS Holding SA will submit an application for approval of ACER-001 in Europe and the timing of filing such application, (iii) whether any such application submitted to European authorities seeking marketing authorization for ACER-001 for the treatment of patients in Europe with UCDs will be approved, and (iv) those other risks, uncertainties and factors described in RELIEF THERAPEUTICS Holding SA’s press releases and filings with the SIX Swiss Exchange and the U.S. Securities and Exchange Commission, all of which could cause the actual results, financial condition, performance or achievements of RELIEF THERAPEUTICS Holding SA to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. RELIEF THERAPEUTICS Holding SA is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise.

CORPORATE CONTACTS

Acer Therapeutics:

Jim DeNike

Acer Therapeutics Inc.

jdenike@acertx.com

+1-844-902-6100

RELIEF THERAPEUTICS Holding SA:

Jack Weinstein

Chief Financial Officer and Treasurer

contact@relieftherapeutics.com

INVESTOR RELATIONS CONTACTS

Acer Therapeutics:

Nick Colangelo

Gilmartin Group

nick@gilmartinIR.com

+1-332-895-3226

RELIEF THERAPEUTICS Holding SA:

Michael Miller

Rx Communications Group

mmiller@rxir.com

+1-917-633-6086

#

Exhibit 99.2

Ad hoc announcement pursuant toArt. 53 LR

Relief Therapeutics Announces PromisingInitial Stability Data on a New Formulation of RLF-100® (Aviptadil)

This new formulation may have important clinicaluses for a variety of rare lung diseases

Geneva, Switzerland,August 3, 2022 – RELIEF THERAPEUTICS Holding SA (SIX: RLF, OTCQB: RLFTF, RLFTY) (“Relief”), a biopharmaceutical company seeking to provide patients therapeutic benefit from serious diseases with high unmet need, announced today promising three-month stability data on a new formulation of RLF-100® (aviptadil). Based on the results thus far, Relief is evaluating the opportunity to file for additional patent protection.

“Aviptadil, when dissolved in saline, is known to have uncertain stability properties, resulting in significant challenges for pharmaceutical supply and use. The development of this novel RLF-100® formulation, therefore, has significant clinical and commercial value. In particular, Relief’s new formulation appears to be shelf-stable at temperatures suitable for shipping and long-term storage” stated Raghuram (Ram) Selvaraju, Ph.D., Chairman of the Board of Directors of Relief. “This new, stable formulation potentially allows RLF-100® to be delivered via multiple routes of administration for treatment of multiple lung disease indications including pulmonary sarcoidosis, acute respiratory distress syndrome (ARDS), berylliosis and checkpoint inhibitor-induced pneumonitis (CIP), all of which Relief seeks to pursue. As previously reported, we intend to initiate a phase 2b dose ranging study in 72 patients with pulmonary sarcoidosis using inhaled RLF-100® administered over a 12-week period, following which patients will have the option to participate in the extension phase. A pre-IND meeting with the U.S. Food and Drug Administration (FDA) is planned to confirm the efficacy and safety endpoints as well as the proposed dosing regimen and, based on a positive outcome, the trial is expected to begin during 2023.”

ABOUT RLF-100®

RLF-100® (aviptadil) is a synthetic form of Vasoactive Intestinal Peptide (“VIP”) consisting of 28 amino acids, which was first discovered in 1970. Although initially identified in the intestinal tract, human VIP is known to be produced throughout the body and to be primarily concentrated in the lungs where it has shown a multimodal mechanism of action: specifically, a decrease of inflammatory cytokines release leading to prevention of cytokine storm syndrome and viral replication, an immunomodulating effect, vasodilating and broncho-dilating effects, and prevention of surfactant depletion. Seventy percent of VIP in the body is bound to a less common type of cell in the lung, the alveolar type 2 cell, which is critical to the transmission of oxygen to the body.

Ad hoc announcement pursuant toArt. 53 LR

RLF-100 has a 20-year history of safe use in humans in multiple human trials for sarcoidosis, idiopathic pulmonary fibrosis, asthma, pulmonary arterial hypertension, and sepsis-induced acute respiratory distress syndrome. A combination of aviptadil with phentolamine is approved for the treatment of erectile dysfunction by intra-cavernous injections in countries outside the U.S.

RLF-100® is under development for certain acute and chronic lung diseases, including pulmonary sarcoidosis, for which it was granted an Orphan Drug Designation ("ODD") by the FDA. RLF-100® is also being explored for treatment of checkpoint inhibitor-induced pneumonitis (“CIP”), an indication in which Relief’s wholly-owned subsidiary, AdVita LifeScience GmbH, received Swiss method-of-use patent protection related to the inhaled formulation of RLF-100® into at least 2039. RLF-100® will also be evaluated in treating non-COVID-19-related ARDS with a particular focus on infectious ARDS. There are also plans to conduct European proof-of-concept clinical development of RLF-100® in the treatment of chronic berylliosis, an orphan lung disease for which there are no treatments approved and which is characterized by severe inflammation of the lungs, coughing and increasing breathlessness (dyspnea).

ABOUT RELIEF

CONTACT:<br><br> <br>RELIEF THERAPEUTICS Holding SA<br><br> <br>Jack Weinstein<br><br> <br>Chief Financial Officer and Treasurer<br><br> <br>contact@relieftherapeutics.com	FOR MEDIA/INVESTOR INQUIRIES:<br><br> <br>Rx Communications Group<br><br> <br>Michael Miller<br><br> <br>+1-917-633-6086<br><br> <br>mmiller@rxir.com

Ad hoc announcement pursuant toArt. 53 LR

Disclaimer: This communication expressly or implicitly contains certain forward-looking statements concerning RELIEF THERAPEUTICS Holding SA. Such statements involve certain known and unknown risks, uncertainties and other factors, including (i) whether aviptadil will ever be approved in the U.S., the U.K., or the E.U. for any disease, and (ii) those risks discussed in RELIEF THERAPEUTICS Holding SA's press releases and filings with the SIX and with the U.S. Securities and Exchange Commission, which could cause the actual results, financial condition, performance or achievements of RELIEF THERAPEUTICS Holding SA to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. RELIEF THERAPEUTICS Holding SA is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise.