Rilpivirine Hydrochloride

New data includes real-world analyses of VOQUEZNA-treated patients in the U.S. diagnosed with gastroesophageal reflux disease (GERD) FLORHAM PARK, N.J., April 28, 2025 (GLOBE NEWSWIRE) -- Phathom Pharmaceuticals, Inc. (Nasdaq: PHAT), a biopharmaceutical company focused on developing and commercializing novel treatments for gastrointestinal (GI) diseases, today announced that the company will present real-world data for its first-in-class treatment VOQUEZNA® (vonoprazan) at Digestive Disease Week® (DDW) being held May 3–6, 2025, in San Diego, CA. VOQUEZNA is the first and only treatment of its kind approved by the U.S. Food and Drug Administration for use in adults for the relief of heartburn associated with Non-Erosive GERD and for the treatment of all severities of Erosive Esophagitis (EE), commonly referred to as Erosive GERD, and relief of related heartburn. Two Phathom-sponsored posters will be presented on May 5, 2025, at 12:30 p.m. PT in the Poster Hall at the San Diego Convention Center. In addition, Phathom will host a Product Theater highlighting VOQUEZNA as a first-in-class treatment for GERD and will maintain a strong presence throughout the conference at booth #1743 on the exhibit floor. “Millions of GERD patients continue to experience inadequate symptom control despite treatment with proton pump inhibitors (PPIs),” said Eckhard Leifke, M.D., Chief Medical Officer at Phathom. “The data we’re presenting at DDW this year analyze real-world treatment patterns and patient characteristics, offering valuable insights into how VOQUEZNA is being used in clinical practice. These findings suggest VOQUEZNA may play an important role for patients who have not achieved sufficient relief with existing therapies and reinforce Phathom’s commitment to advancing the understanding and management of acid-related GI diseases. We look forward to engaging with healthcare professionals and thought leaders at DDW to further discuss the evolving treatment landscape.” A high-level schedule of Phathom-sponsored activities at DDW 2025 can be found below: Sunday, May 4, 2025 VOQUEZNA® (vonoprazan) Product Theater: Expert Insights on GERD Therapy: A Case-Based Approach with a First-In-Class Acid Suppressant Time: 12:15 – 1:00 pm PTPresenters: Dr. John Erik Pandolfino and Dr. Felice Schnoll-SussmanLocation: DDW Theater 1 Independent Medscape CME Symposia: Clinical Decisions in the Management of GERD: A Patient Simulation Challenge Time: 6:00 – 7:30 pm PTPresenters: Dr. Charles Vega, Dr. Prakesh Gyawali and Dr. Rena YadlapatiIndependent CME sponsored by Phathom Pharmaceuticals Monday, May 5, 2025 Tadataka ‘Tachi’ Yamada, MD, Lecture: Pivotal Role of Acid Suppression: PPIs, PCABs and Beyond in Clinical Practice Time: 8:00 – 9:30 am PTAGA Clinical Symposium sponsored by Phathom Pharmaceuticals Real-World Demographic and Clinical Characteristics of Vonoprazan-Treated Patients in the United States Diagnosed With GERD: A Descriptive Analysis of Non-Erosive vs. Erosive GERD Time: 12:30 pm PTPresentation #: Mo1369Poster Session Real-World Treatment Patterns of Prior Lines of PPI Therapy in Vonoprazan-Treated Patients in the United States Diagnosed with Non-Erosive or Erosive GERD Time: 12:30 pm PTPresentation #: Mo1363Poster Session Following the meeting, data abstracts will be available on Phathom’s publications and scientific congresses section of the company website. VOQUEZNA is marketed exclusively by Phathom Pharmaceuticals, Inc. Please visit VoqueznaPro.com to learn more about VOQUEZNA. About DDWDigestive Disease Week® (DDW) is the largest international gathering of physicians, researchers and academics in the fields of gastroenterology, hepatology, endoscopy and gastrointestinal surgery. Jointly sponsored by the American Association for the Study of Liver Diseases (AASLD), the American Gastroenterological Association (AGA), the American Society for Gastrointestinal Endoscopy (ASGE) and the Society for Surgery of the Alimentary Tract (SSAT), DDW is an in-person and online meeting from May 3-6, 2025. The meeting showcases more than 5,600 abstracts and hundreds of lectures on the latest advances in GI research, medicine and technology. More information can be found at www.ddw.org. INDICATIONS AND USAGE VOQUEZNA® (vonoprazan) is a potassium-competitive acid blocker (PCAB) indicated in adults: for the healing of all grades of Erosive Esophagitis (Erosive Gastroesophageal Reflux Disease or Erosive GERD) and relief of heartburn associated with Erosive GERD.to maintain healing of all grades of Erosive GERD and relief of heartburn associated with Erosive GERD.for the relief of heartburn associated with Non-Erosive GERD.in combination with amoxicillin and clarithromycin for the treatment of Helicobacter pylori (H. pylori) infection.in combination with amoxicillin for the treatment of H. pylori infection. IMPORTANT SAFETY INFORMATION CONTRAINDICATIONS VOQUEZNA is contraindicated in patients with a known hypersensitivity to vonoprazan or any component of VOQUEZNA, or in patients receiving rilpivirine-containing products. For information about contraindications of antibacterial agents (clarithromycin and amoxicillin) indicated in combination with VOQUEZNA, refer to the Contraindications section of the corresponding prescribing information. WARNINGS AND PRECAUTIONS Presence of Gastric Malignancy: In adults, symptomatic response to therapy with VOQUEZNA does not preclude the presence of gastric malignancy. Consider additional follow-up and diagnostic testing in patients who have a suboptimal response or an early symptomatic relapse after completing treatment with VOQUEZNA. In older patients, also consider endoscopy. Acute Tubulointerstitial Nephritis: Acute tubulointerstitial nephritis (TIN) has been reported with VOQUEZNA. If suspected, discontinue VOQUEZNA and evaluate patients with suspected acute TIN. Clostridioides difficile-Associated Diarrhea: Published observational studies suggest that proton pump inhibitors (PPIs) may be associated with an increased risk of Clostridioides difficile-associated diarrhea (CDAD), especially in hospitalized patients. VOQUEZNA may also increase the risk of CDAD. Consider CDAD in patients with diarrhea that does not improve. Use the shortest duration of VOQUEZNA appropriate to the condition being treated. CDAD has been reported with use of nearly all antibacterial agents. For more information specific to antibacterial agents (clarithromycin and amoxicillin) indicated for use in combination with VOQUEZNA, refer to Warnings and Precautions section of the corresponding prescribing information. Bone Fracture: Several published observational studies suggest that PPI therapy may be associated with an increased risk for osteoporosis-related fractures of the hip, wrist, or spine, especially in patients receiving high dose (multiple daily doses) and long-term therapy (a year or longer). Bone fracture, including osteoporosis-related fracture, has also been reported with vonoprazan. Use the shortest duration of VOQUEZNA appropriate to the condition being treated. Patients at risk for osteoporosis-related fractures should be managed according to the established treatment guidelines. Severe Cutaneous Adverse Reactions (SCAR): Severe cutaneous adverse reactions, including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) have been reported with VOQUEZNA. Discontinue VOQUEZNA at the first signs or symptoms of SCAR or other signs of hypersensitivity and consider further evaluation. Vitamin B12 (Cobalamin) Deficiency: Long-term use of acid-suppressing drugs can lead to malabsorption of Vitamin B12 caused by hypo- or achlorhydria. Vitamin B12 deficiency has been reported postmarketing with vonoprazan. If clinical symptoms consistent with vitamin B12 deficiency are observed in patients treated with VOQUEZNA, consider further workup. Hypomagnesemia and Mineral Metabolism: Hypomagnesemia has been reported postmarketing with vonoprazan. Hypomagnesemia may lead to hypocalcemia and/or hypokalemia and may exacerbate underlying hypocalcemia in at-risk patients. Consider monitoring magnesium levels prior to initiation of VOQUEZNA and periodically in patients expected to be on prolonged treatment, in patients taking drugs that may have increased toxicity in the presence of hypomagnesemia or drugs that may cause hypomagnesemia. Treatment of hypomagnesemia may require magnesium replacement and discontinuation of VOQUEZNA. Consider monitoring magnesium and calcium levels prior to initiation of VOQUEZNA and periodically while on treatment in patients with a preexisting risk of hypocalcemia. Supplement with magnesium and/or calcium, as necessary. If hypocalcemia is refractory to treatment, consider discontinuing VOQUEZNA. Interactions with Diagnostic Investigations for Neuroendocrine Tumors: Serum chromogranin A (CgA) levels increase secondary to drug-induced decreases in gastric acidity. The increased CgA level may cause false positive results in diagnostic investigations for neuroendocrine tumors. Temporarily discontinue VOQUEZNA treatment at least 4 weeks before assessing CgA levels and consider repeating the test if initial CgA levels are high. Fundic Gland Polyps: Use of VOQUEZNA is associated with a risk of fundic gland polyps that increases with long-term use, especially beyond one year. Fundic gland polyps have been reported with vonoprazan in clinical trials and during postmarketing use with PPIs. Most patients who developed fundic gland polyps were asymptomatic and fundic gland polyps were identified incidentally on endoscopy. Use the shortest duration of VOQUEZNA appropriate to the condition being treated. ADVERSE REACTIONS: Healing of Erosive GERD: The most common adverse reactions (≥2% of patients in the VOQUEZNA arm) include gastritis (3%), diarrhea (2%), abdominal distention (2%), abdominal pain (2%), and nausea (2%). Maintenance of Healed Erosive GERD: The most common adverse reactions (≥3% of patients in the VOQUEZNA arm) include gastritis (6%), abdominal pain (4%), dyspepsia (4%), hypertension (3%), and urinary tract infection (3%). Relief of Heartburn Associated with Non-Erosive GERD: The most common adverse reactions (≥2% of patients in the VOQUEZNA arm) include abdominal pain (2%), constipation (2%), diarrhea (2%), nausea (2%), and urinary tract infection (2%). Treatment of H. Pylori Infection (VOQUEZNA and Amoxicillin): The most common adverse reactions (≥2% in any treatment arm) include diarrhea (5%), abdominal pain (3%), vulvovaginal candidiasis (2%), nasopharyngitis (2%), dysgeusia (1%), headache (1%), and hypertension (1%). Treatment of H. Pylori Infection (VOQUEZNA, Amoxicillin and Clarithromycin): The most common adverse reactions (≥2% in any treatment arm) include dysgeusia (5%), diarrhea (4%), vulvovaginal candidiasis (3%), headache (3%), abdominal pain (2%), hypertension (2%), and nasopharyngitis (<1%). For more information on adverse reactions and laboratory changes with amoxicillin or clarithromycin, refer to Adverse Reactions section of the corresponding prescribing information. DRUG INTERACTIONS VOQUEZNA has the potential for clinically important drug interactions, including interactions with drugs dependent on gastric pH for absorption, drugs that are substrates for certain CYP enzymes, and some diagnostic tests. Avoid concomitant use of VOQUEZNA with atazanavir or nelfinavir. See full Prescribing Information for more details about important drug interactions. Consult the labeling of concomitantly used drugs to obtain further information about interactions with vonoprazan. For information about drug interactions, contraindications, and warnings and precautions of antibacterial agents (amoxicillin or clarithromycin) indicated in combination with VOQUEZNA, refer to their corresponding prescribing information. USE IN SPECIFIC POPULATIONS Lactation: Breastfeeding is not recommended during treatment. Because of the potential risk of adverse liver effects shown in animal studies with vonoprazan, advise patients not to breastfeed during treatment with VOQUEZNA. Renal Impairment: For the healing of Erosive GERD, dosage reduction is recommended in patients with severe renal impairment (eGFR < 30 mL/min). Use of VOQUEZNA is not recommended for the treatment of H. pylori infection in patients with severe renal impairment. Hepatic Impairment: For the healing of Erosive GERD, dosage reduction is recommended in patients with moderate to severe hepatic impairment (Child-Pugh Class B and C). Use of VOQUEZNA is not recommended for the treatment of H. pylori infection in patients with moderate to severe hepatic impairment. You are encouraged to report suspected adverse reactions by contacting Phathom Pharmaceuticals at 1-888-775-PHAT (7428) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. Please click here to see full Prescribing Information for VOQUEZNA. About Gastroesophageal Reflux Disease (GERD) GERD is one of the most prevalent gastrointestinal diseases, with approximately 1 in 5 U.S. adults living with the condition. Depending on the severity, GERD can cause heartburn, regurgitation, difficulty eating and drinking and damage to the esophageal lining. There are two main types of GERD. The largest category of GERD is Non-Erosive GERD, which is characterized by reflux-related symptoms in the absence of esophageal mucosal erosions. It is estimated that approximately 70% of the overall GERD population have Non-Erosive GERD. Symptoms of Non-Erosive GERD may impact overall quality of life and can include episodic heartburn, especially at night, regurgitation, problems swallowing, and chest pain. Erosive GERD, also referred to as Erosive Esophagitis (EE), is a subtype of GERD characterized by erosions in the gastric mucosa caused by acidic reflux of stomach contents into the esophagus. There are estimated to be over 65 million individuals with GERD in the U.S., of which approximately 30% have Erosive GERD. In addition to experiencing troubling symptoms including heartburn, patients with inadequately treated Erosive GERD may progress to more severe diseases including Barrett’s esophagus and esophageal cancer. About VOQUEZNA® VOQUEZNA® (vonoprazan) tablets contain vonoprazan, an oral small molecule potassium-competitive acid blocker (PCAB). PCABs are a novel class of medicines that block acid secretion in the stomach. VOQUEZNA is approved in the U.S. for the treatment of adults with Erosive Esophagitis, also known as Erosive GERD, the relief of heartburn associated with Erosive GERD, the relief of heartburn associated with Non-Erosive GERD, and for the treatment of H. pylori infection in combination with either amoxicillin or amoxicillin and clarithromycin. Phathom in-licensed the U.S. rights to vonoprazan from Takeda, which markets the product in Japan and numerous other countries in Asia and Latin America.  About Phathom Pharmaceuticals, Inc. Phathom Pharmaceuticals is a biopharmaceutical company focused on the development and commercialization of novel treatments for gastrointestinal diseases. Phathom has in-licensed the exclusive rights to vonoprazan, a first-in-class potassium-competitive acid blocker (PCAB) that is currently marketed in the United States as VOQUEZNA® (vonoprazan) tablets for the relief of heartburn associated with Non-Erosive GERD in adults, the healing and maintenance of healing of Erosive GERD in adults and relief of associated heartburn, in addition to VOQUEZNA® TRIPLE PAK® (vonoprazan tablets, amoxicillin capsules, clarithromycin tablets) and VOQUEZNA® DUAL PAK® (vonoprazan tablets, amoxicillin capsules) for the treatment of H. pylori infection in adults. For more information about Phathom, visit the company’s website at www.phathompharma.com and follow on LinkedIn and X. Forward Looking StatementThis press release contains forward-looking statements. Investors are cautioned not to place undue reliance on these forward-looking statements, including statements about the possible treatment role that VOQUEZNA plays for GERD patients, Phathom’s plans to continue to engage with healthcare professions regarding treatment options and estimates of the patient populations with GERD. The inclusion of forward-looking statements should not be regarded as a representation by Phathom that any of its plans will be achieved. Actual results may differ from those set forth in this press release due to the risks and uncertainties inherent in Phathom’s business, including, without limitation: the results of market research regarding real-world usage of VOQUEZNA may not predict acceptance by patients, healthcare providers or payors in the future; we may not be able to successfully commercialize VOQUEZNA, VOQUEZNA TRIPLE PAK and VOQUEZNA DUAL PAK, which will depend on a number of factors including coverage and reimbursement levels from governmental authorities and health insurers as well as market acceptance by healthcare providers; regulatory developments in the United States and foreign countries; unexpected adverse side effects or inadequate efficacy of vonoprazan that may limit its development, regulatory approval and/or commercialization, or may result in recalls or product liability claims; Phathom’s ability to obtain and maintain intellectual property protection and non-patent regulatory exclusivity for vonoprazan; Phathom’s estimates regarding patient population and commercial coverage could prove to be inaccurate; and other risks described in the Company’s prior press releases and the Company’s filings with the Securities and Exchange Commission (SEC), including under the heading “Risk Factors” in the Company’s most recent Annual Report on Form 10-K and any subsequent filings with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, and Phathom undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date hereof. All forward-looking statements are qualified in their entirety by this cautionary statement, which is made under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. MEDIA CONTACTNick Benedetto1-877-742-8466media@phathompharma.com INVESTOR CONTACTEric Sciorilli1-877-742-8466ir@phathompharma.com © 2025 Phathom Pharmaceuticals. All rights reserved. VOQUEZNA, VOQUEZNA TRIPLE PAK, VOQUEZNA DUAL PAK, Phathom Pharmaceuticals, and their respective logos are registered trademarks of Phathom Pharmaceuticals, Inc.

For the first time, Thompson shares his journey living with gastroesophageal reflux disease (GERD) and experience using VOQUEZNA, as part of the new GERD IS NO JOKE campaignVOQUEZNA is a potassium competitive acid blocker (PCAB), the first and only FDA-approved treatment of its kind for both types of GERD1 A Media Snippet accompanying this announcement is available by clicking on this link. FLORHAM PARK, N.J., March 31, 2025 (GLOBE NEWSWIRE) -- Phathom Pharmaceuticals, Inc. (Nasdaq: PHAT), a biopharmaceutical company focused on developing and commercializing novel treatments for gastrointestinal (GI) diseases, announced today a partnership with actor, comedian, and author Kenan Thompson, best known as the longest-running cast member on Saturday Night Live. For the first time ever, Thompson is publicly speaking out about his experience with GERD as part of the GERD IS NO JOKE campaign to raise awareness about the condition and encourage others to talk with their doctor about treatment options. Thompson, who has been diagnosed with the most common form of GERD, called Non-Erosive GERD, found heartburn relief with VOQUEZNA® (vonoprazan) after struggling with other treatments. VOQUEZNA is the first and only treatment of its kind approved by the U.S. Food and Drug Administration (FDA) to help manage his condition.1 VOQUEZNA is approved for use in adults for the relief of heartburn associated with Non-Erosive GERD and for the treatment of all severities of Erosive Esophagitis, commonly referred to as Erosive GERD, and relief of related heartburn.1 As one of more than 65 million people in the U.S. living with GERD2—a chronic condition where stomach acid flows into the esophagus, causing irritation and heartburn3—Thompson knows firsthand how disruptive symptoms can be. His goal is to help elevate the discussion around GERD and help others recognize the importance of finding an effective treatment to better manage their disease. “This is the first time I’m sharing my story with GERD, and trust me—it's no joke,” said Thompson. “I’ve dealt with terrible burning in my chest, avoided some of my favorite foods, and even had my heartburn affect my voice and sleep, which is tough when your job is to make people laugh. After struggling with treatments that didn’t work, my doctor recommended VOQUEZNA, and it helped me kick some acid and reduce my heartburn! I’m excited to partner with Phathom to encourage others to talk to their doctor and find the right treatment for them.” While Thompson has not experienced side effects while taking VOQUEZNA, some patients taking VOQUEZNA do. The most common side effects of VOQUEZNA for the relief of heartburn related to Non-Erosive GERD include stomach pain, constipation, diarrhea, nausea, and urinary tract infection.1 Please see additional Important Safety Information below. Thompson shares more about his personal story with GERD at GERDIsNoJoke.com, including a downloadable guide from his own unique point of view, and helpful tips for people to talk to their doctor about the condition. “Despite using over-the-counter medications and prescription treatments like antacids, histamine-2 receptor antagonists, or proton pump inhibitors—also called PPIs—many people with GERD continue to experience persistent, bothersome symptoms which could affect their daily lives,” said Kavita Kongara, M.D., Motility Clinical Chair and Georgia Physician Executive Committee Member, United Digestive, Physician, Atlanta Gastroenterology Associates. “It’s crucial that patients engage in open, honest conversations with their healthcare providers to explore all available therapeutic approaches. VOQUEZNA, a first-in-class PCAB, works differently than traditional medications and provides rapid and durable acid suppression, resulting in effective relief from heartburn and making it an important and differentiated option for GERD management.” As part of the campaign, Thompson is also taking on the comedic role of a chef in a “Kick Some Acid Cooking Show," a humorous nod to how VOQUEZNA has helped him better control his GERD-related heartburn. This multi-channel campaign will feature a new commercial airing next month on broadcast television and streaming platforms—including Prime Video, Hulu, and Peacock—and will also extend across digital platforms such as Facebook and Instagram, and in waiting rooms at doctors’ offices. The goal of the light-hearted campaign is to empower individuals experiencing persistent heartburn to consult their healthcare providers. “Phathom is passionate about supporting the millions of patients living with GERD and working to advance innovative treatments to address unmet needs," said Martin Gilligan, Chief Commercial Officer at Phathom. “We are excited to partner with Kenan Thompson, who has been making audiences laugh and feel good for decades. Kenan's story is inspiring and relatable to so many GERD sufferers. By sharing his journey for the first time, he’s helping to spark conversations and encourage others to talk to their doctors about VOQUEZNA.” To learn more about Thompson’s story, tips for discussing GERD with your healthcare provider, and VOQUEZNA as a treatment option, visit GERDIsNoJoke.com. A Media Snippet accompanying this announcement is available by clicking on this link. INDICATION AND IMPORTANT SAFETY INFORMATION What is VOQUEZNA? VOQUEZNA® (vonoprazan) is a prescription medicine used in adults: for 8 weeks to heal acid-related damage to the lining of the esophagus (called Erosive Esophagitis) and for relief of heartburn related to Erosive Esophagitis.for up to 6 months to maintain healing of Erosive Esophagitis and for relief of heartburn related to Erosive Esophagitis.for 4 weeks for relief of heartburn related to gastroesophageal reflux disease (GERD). It is not known if VOQUEZNA is safe and effective in children. Do not take VOQUEZNA if you: are allergic to vonoprazan or any of the other ingredients in VOQUEZNA. Allergic reaction symptoms may include trouble breathing, rash, itching, and swelling of your face, lips, tongue or throat.are taking a medicine that contains rilpivirine (EDURANT, COMPLERA, JULUCA, ODEFSEY) used to treat HIV-1 (Human Immunodeficiency Virus). Before taking VOQUEZNA, tell your healthcare provider about all your medical conditions, including if you: have low magnesium, calcium, or potassium in your blood, or you are taking a medicine to increase urine (diuretic).have kidney or liver problems.are pregnant, think you may be pregnant, or plan to become pregnant. It is not known if VOQUEZNA will harm your unborn baby.are breastfeeding or plan to breastfeed. It is not known if VOQUEZNA passes into your breast milk. You and your healthcare provider should decide if you will take VOQUEZNA or breastfeed. You should not do both. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Keep a list of them to show your healthcare provider and pharmacist when you get a new medicine. VOQUEZNA may affect how other medicines work, and other medicines may affect how VOQUEZNA works. Especially tell your healthcare provider if you take medicine that contains rilpivirine (EDURANT, COMPLERA, JULUCA, ODEFSEY). What are the possible side effects of VOQUEZNA? VOQUEZNA may cause serious side effects including: A type of kidney problem (acute tubulointerstitial nephritis): Some people who take VOQUEZNA may develop a kidney problem called acute tubulointerstitial nephritis. Call your healthcare provider right away if you have a decrease in the amount that you urinate or if you notice blood in your urine.Diarrhea caused by an infection (Clostridioides difficile) in your intestines: Call your healthcare provider right away if you have watery stools, stomach pain, and fever that does not go away.Bone fractures (hip, wrist, or spine): Bone fractures in the hip, wrist, or spine may happen in people who take multiple daily doses of another type of medicine that reduces acid in your stomach known as proton pump inhibitors (PPI medicines) for a long period of time (a year or longer). Tell your healthcare provider if you have a bone fracture, especially in the hip, wrist, or spine.Severe skin reactions: VOQUEZNA can cause rare, but severe skin reactions that may affect any part of your body. These serious skin reactions may need to be treated in a hospital and may be life threatening: Skin rash which may have blistering, peeling, or bleeding on any part of your skin.You may also have fever, chills, body aches, shortness of breath, or enlarged lymph nodes. If you experience any of these symptoms, stop taking VOQUEZNA and call your healthcare provider right away. These symptoms may be the first sign of a severe skin reaction. Low vitamin B-12 levels: VOQUEZNA lowers the amount of acid in your stomach. Stomach acid is needed to absorb Vitamin B12 properly. Tell your healthcare provider if you have symptoms of low vitamin B12 levels, including irregular heartbeat, shortness of breath, lightheadedness, tingling or numbness in the arms or legs, muscle weakness, pale skin, feeling tired, or mood changes. Talk with your healthcare provider about the risk of low vitamin B12 levels if you have been on VOQUEZNA for a long time.Low magnesium levels in the body can happen in people who take VOQUEZNA. Tell your healthcare provider right away if you have symptoms of low magnesium levels, including seizures, dizziness, irregular heartbeat, jitteriness, muscle aches or weakness, or spasms of the hands, feet, or voice.Stomach growths (fundic gland polyps): A certain type of stomach growth called fundic gland polyps may happen in people who take another type of medicine that reduces acid in your stomach known as proton pump inhibitors (PPI medicines) for a long time. Talk with your healthcare provider about the possibility of fundic gland polyps if you have been on VOQUEZNA for a long time. The most common side effects of VOQUEZNA for treatment of Erosive Esophagitis and/or relief of heartburn related to gastroesophageal reflux disease include: • stomach inflammation• indigestion• diarrhea• constipation• stomach bloating• high blood pressure• stomach pain• urinary tract infection• nausea These are not all the possible side effects of VOQUEZNA. For more information, ask your healthcare provider or pharmacist. Call your healthcare provider for medical advice about side effects. You are encouraged to report suspected adverse reactions by contacting Phathom Pharmaceuticals at 1-888-775-PHAT (7428) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. Please see Patient Information and full Prescribing Information for VOQUEZNA. About Erosive and Non-Erosive Gastroesophageal Reflux Disease (GERD)Erosive GERD, also referred to as Erosive Esophagitis (EE), is a subtype of gastroesophageal reflux disease (GERD) characterized by erosions in the gastric mucosa caused by acidic reflux of stomach contents into the esophagus.4 There are estimated to be over 65 million individuals with GERD in the U.S.,2 of which approximately 30% have Erosive GERD.3 In addition to experiencing troubling symptoms including heartburn, patients with inadequately treated Erosive GERD may progress to more severe diseases including Barrett’s esophagus and esophageal cancer.5 Non-Erosive GERD is the largest category of GERD and is characterized by reflux-related symptoms in the absence of esophageal mucosal erosions.3 It is estimated that approximately 70% of the overall GERD population have Non-Erosive GERD.3 Symptoms of Non-Erosive GERD may impact overall quality of life and can include episodic heartburn, especially at night, regurgitation, problems swallowing, and chest pain.2,3 About VOQUEZNA®VOQUEZNA® (vonoprazan) tablets contain vonoprazan, an oral small molecule potassium-competitive acid blocker (PCAB). PCABs are a novel class of medicines that block acid secretion in the stomach. VOQUEZNA is approved in the U.S. for the treatment of adults with Erosive Esophagitis, also known as Erosive GERD, the relief of heartburn associated with Erosive GERD, the relief of heartburn associated with Non-Erosive GERD, and for the treatment of H. pylori infection in combination with either amoxicillin or amoxicillin and clarithromycin. Phathom in-licensed the U.S. rights to vonoprazan from Takeda, which markets the product in Japan and numerous other countries in Asia and Latin America. About Phathom Pharmaceuticals, Inc.Phathom Pharmaceuticals is a biopharmaceutical company focused on the development and commercialization of novel treatments for gastrointestinal diseases. Phathom has in-licensed the exclusive rights to vonoprazan, a first-in-class potassium-competitive acid blocker (PCAB) that is currently marketed in the United States as VOQUEZNA® (vonoprazan) tablets for the relief of heartburn associated with Non-Erosive GERD in adults, the healing and maintenance of healing of Erosive GERD in adults and relief of associated heartburn, in addition to VOQUEZNA® TRIPLE PAK® (vonoprazan tablets, amoxicillin capsules, clarithromycin tablets) and VOQUEZNA® DUAL PAK® (vonoprazan tablets, amoxicillin capsules) for the treatment of H. pylori infection in adults. For more information about Phathom, visit the company’s website at www.phathompharma.com and follow on LinkedIn and X. Forward-Looking StatementsThis press release contains forward-looking statements. Investors are cautioned not to place undue reliance on these forward-looking statements, including statements about the Company’s estimates of the number of patients with GERD. The inclusion of forward-looking statements should not be regarded as a representation by Phathom that any of its plans will be achieved. Actual results may differ from those set forth in this press release due to the risks and uncertainties inherent in Phathom’s business, including, without limitation: the Company’s estimates regarding patient population could prove to be inaccurate and other risks described in the Company’s prior press releases and the Company’s filings with the Securities and Exchange Commission (SEC), including under the heading “Risk Factors” in the Company’s most recent Annual Report on Form 10-K and any subsequent filings with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, and Phathom undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date hereof. All forward-looking statements are qualified in their entirety by this cautionary statement, which is made under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. References VOQUEZNA. Prescribing Information. Phathom Pharmaceuticals; 2024.Machicado JD, Greer JB, Yadav D. (2021) Epidemiology of Gastrointestinal Diseases. In: Pitchumoni CS, Dharmarajan T, (eds). Geriatric Gastroenterology. Springer, Cham. https://doi-org.libproxy1.nus.edu.sg/10.1007/978-3-030-30192-7_7Antunes C, Aleem A, Curtis SA. Gastroesophageal reflux disease. NCBI Bookshelf. Accessed January 21, 2024. Available at: https://www-ncbi-nlm-nih-gov.libproxy1.nus.edu.sg/books/NBK441938/?report=printableDickman R, Maradey-Romero C, Gingold-Belfer R, Fass R. Unmet Needs in the Treatment of Gastroesophageal Reflux Disease. J Neurogastroenterol Motil. 2015 Jul 30;21(3):309-19. doi: 10.5056/jnm15105. Savarino E, de Bortoli N, De Cassan C, et al. The natural history of gastro-esophageal reflux disease: A comprehensive review. Dis Esophagus. 2017;30(2):1-9. MEDIA CONTACTNick Benedetto1-877-742-8466media@phathompharma.com INVESTOR CONTACTEric Sciorilli1-877-742-8466ir@phathompharma.com © 2025 Phathom Pharmaceuticals. All rights reserved. VOQUEZNA, VOQUEZNA TRIPLE PAK, VOQUEZNA DUAL PAK, Phathom Pharmaceuticals, and their respective logos are registered trademarks of Phathom Pharmaceuticals, Inc. 03/25US-VPZ-24-0652