Eravacycline Dihydrochloride

Zoliflodacin, an investigational single-dose oral antibiotic for uncomplicated gonorrhea, to be featured in oral presentation with key subset analyses from pivotal global Phase 3 trial Waltham, MA – October 20, 2025 – Innoviva Specialty Therapeutics, a subsidiary of Innoviva, Inc. (NASDAQ: INVA), will share new data on zoliflodacin during the Infectious Disease Society of America’s IDWeek 2025 annual meeting in Atlanta, GA, October 19-22, 2025. Zoliflodacin is a first-in-class oral antibiotic being developed for the treatment of uncomplicated gonorrhea. Three sets of data will be presented, including an oral presentation and two poster presentations: Poster Presentation P-1206 Date: Tuesday, October 21, 2025 Time: 12:15 PM – 1:30 PM ET Location: Poster Hall B4-B5 Title: Association of Sex Assigned at Birth and Sexual Orientation with Antimicrobial Susceptibility of Baseline Neisseria gonorrhoeae Isolates from Participants Recruited in the Global Zoliflodacin Phase 3 Randomized Controlled Trial Poster Presentation P-1207 Date: Tuesday, October 21, 2025 Time: 12:15 PM – 1:30 PM ET Location: Poster Hall B4-B5 Title: In Vitro Activity of Zoliflodacin against Neisseria gonorrhoeae Isolates Collected in 2022 from The United States Oral Presentation Date: Wednesday, October 22, 2025 Time: 1:45-3:00 Location: B211-B212 Title: Subgroup Analyses of Microbiological Cure Rates by Baseline Zoliflodacin MIC and Susceptibility to Ciprofloxacin in Participants from the Global Zoliflodacin Phase 3 Randomize Controlled Trial The oral presentation on Wednesday, October 22, describes key subgroup findings from the pivotal Phase 3 trial, including observation of high microbiological cure rates across urogenital, rectal, and pharyngeal sites in infection caused by Neisseria gonorrhoeae with a zoliflodacin MIC of ≤0.25 µg/mL. Among participants with urogenital infections who received zoliflodacin, ciprofloxacin-resistant strains had a cure rate of 96.6% (346/358; 95% CI: 94.2–98.3) and ciprofloxacin-susceptible strains had a cure rate of 97.4% (113/116; 95% CI: 92.6–99.5). High cure rates were consistent regardless of infection site. In poster P-1206 to be presented on Tuesday October 21, a demographic analysis of baseline isolates from the zoliflodacin Phase 3 trial found that while azithromycin resistance was higher in isolates from men who have sex with men (MSM), zoliflodacin MIC values were comparable across all patient groups, including females, MSM and heterosexual men (HSM). These findings underscore the in vitro activity of zoliflodacin across antibiotic-resistant N. gonorrhoeae from a broad range of sources and support the continued development of zoliflodacin as a single, oral dose treatment for uncomplicated gonorrhea. “Findings from our analyses reinforce our initial conclusions and support the development of zoliflodacin as a potentially transformative treatment for gonorrhea, including infections caused by resistant strains,” stated Dr. David Altarac, Chief Medical Officer of Innoviva Specialty Therapeutics. “Achieving high and consistent cure rates across urogenital and extra-genital sites, resistance profiles, and patient demographics represents a significant opportunity to address the growing global threat of antibiotic-resistant Neisseria gonorrhoeae.” Complementary analyses presented in poster P-1207 further support the potential of zoliflodacin as a broadly effective treatment for gonorrhea. In vitro susceptibility testing of Neisseria gonorrhoeae clinical isolates collected in the U.S. during 2022 confirmed that zoliflodacin potency remained consistent compared to prior surveillance years (2020–2021), including against antibiotic-resistant strains and isolates from both male and female patients. “The results from all three presentations show that zoliflodacin mechanism of action is differentiated from fluoroquinolones with cure rates remaining high in the face of antibiotic resistance,” said Dr. Sarah McLeod, Senior Director, Innoviva Specialty Therapeutics. About Zoliflodacin Zoliflodacin is an investigational, first-in-class oral antibiotic from the spiropyrimidinetrione class, currently in development as a single-dose treatment for uncomplicated gonorrhea, including strains resistant to current first-line therapies. Zoliflodacin inhibits bacterial DNA gyrase, an essential enzyme for bacterial survival. Zoliflodacin mechanism of action is distinct from that of currently approved antibiotics and has demonstrated activity against drug-resistant Neisseria gonorrhoeae. Non-inferiority was demonstrated in the global Phase 3 trial (NCT03959527) where a single oral dose of zoliflodacin was compared to ceftriaxone plus azithromycin for uncomplicated urogenital gonorrhea. This trial was sponsored by the Global Antibiotic Research and Development Partnership (GARDP). The U.S. FDA has granted zoliflodacin a Qualified Infectious Disease Product (QIDP) designation. This designation allows FDA Priority Review and Extended Market Exclusivity. Innoviva Specialty Therapeutics, Inc., anticipates that the NDA review will proceed according to the standard process for drugs with this designation. About Innoviva Specialty Therapeutics Innoviva Specialty Therapeutics, a subsidiary of Innoviva, Inc., is focused on delivering innovative therapies in critical care and infectious disease. Innoviva Specialty Therapeutics’ products, through its affiliate, La Jolla Pharmaceutical Company, include GIAPREZA® (angiotensin II), approved to increase blood pressure in adults with septic or other distributive shock, and XERAVA® (eravacycline) for the treatment of complicated intra-abdominal infections in adults. Innoviva Specialty Therapeutics’ products, through its affiliate, Entasis Therapeutics Inc., include XACDURO® (sulbactam for injection; durlobactam for injection), co-packaged for intravenous use approved for the treatment of adults with hospital-acquired bacterial pneumonia and ventilator-associated bacterial pneumonia caused by susceptible strains of Acinetobacter baumannii-calcoaceticus complex (Acinetobacter). ZEVTERA® (ceftobiprole) is an FDA-approved cephalosporin specifically designed to treat adult patients with acute bacterial skin and skin structure infections (ABSSSI), adult patients with Staphylococcus aureus bloodstream infections (bacteremia) including those with right-sided infective endocarditis, and adult and pediatric patients (3 months to less than 18 years old) with community-acquired bacterial pneumonia (CABP). The Company’s clinical pipeline includes zoliflodacin, an investigational antibiotic for uncomplicated gonorrhea, which is being developed in collaboration with the Global Antibiotic Research and Development Partnership (GARDP), and is currently under review by the U.S. Food and Drug Administration. For more information about Innoviva Specialty Therapeutics, please visit here. Forward Looking Statements This press release contains certain “forward-looking” statements as that term is defined in the Private Securities Litigation Reform Act of 1995 regarding, among other things, statements relating to goals, plans, objectives, and future events. Innoviva intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. The words “anticipate”, “expect”, “goal”, “intend”, “objective”, “opportunity”, “plan”, “potential”, “target” and similar expressions are intended to identify such forward-looking statements. Such forward-looking statements involve substantial risks, uncertainties, and assumptions. These statements are based on the current estimates and assumptions of the management of Innoviva as of the date of this press release and are subject to known and unknown risks, uncertainties, changes in circumstances, assumptions and other factors that may cause the actual results of Innoviva to be materially different from those reflected in the forward-looking statements. Important factors that could cause actual results to differ materially from those indicated by such forward-looking statements include, among others, risks related to: expected cost savings; lower than expected future royalty revenue from respiratory products partnered with GSK; the commercialization of RELVAR®/BREO® ELLIPTA®, ANORO® ELLIPTA® and, formerly, TRELEGY® ELLIPTA® in the jurisdictions in which these products have been approved; the strategies, plans and objectives of Innoviva (including Innoviva’s growth strategy and corporate development initiatives beyond the existing respiratory portfolio); the timing, manner, and amount of potential capital returns to shareholders; the status and timing of clinical studies, data analysis and communication of results; the potential benefits and mechanisms of action of product candidates; expectations for product candidates through development and commercialization; the timing of regulatory approval of product candidates; and projections of revenue, expenses and other financial items; the impact of the novel coronavirus (COVID-19). Other risks affecting Innoviva are described under the headings “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in Innoviva’s Annual Report on Form 10-K for the year ended December 31, 2022 and Quarterly Reports on Form 10-Q, which are on file with the Securities and Exchange Commission (SEC) and available on the SEC’s website at www.sec.gov. Past performance is not necessarily indicative of future results. No forward-looking statements can be guaranteed, and actual results may differ materially from such statements. Given these uncertainties, you should not place undue reliance on these forward-looking statements. The information in this press release is provided only as of the date hereof, and Innoviva assumes no obligation to update its forward-looking statements on account of new information, future events or otherwise, except as required by law. Media Contact: David Patti Corporate Communications Innoviva, Inc. david.patti@inva.com Investor Contact: Eleanor Barisser Eleanor.barisser@inva.com

Highlights include an oral presentation of a subset analysis from the Phase 3 clinical trial of zoliflodacin, an investigational single-dose oral treatment for uncomplicated gonorrhea due to Neisseria gonorrhoeae Waltham, MA – October 7, 2025 – Innoviva Specialty Therapeutics, a subsidiary of Innoviva, Inc. (NASDAQ: INVA), today announced that it will deliver data from six presentations at IDWeek 2025, including clinical data, pharmacokinetic-pharmacodynamic (PK/PD) analyses, and microbiologic surveillance from its growing portfolio of antibiotics and critical care medicines. IDWeek will be held in Atlanta, GA, from October 19-22, 2025. Highlights include two oral presentations: a subset analysis from the Phase 3 trial of zoliflodacin, an investigational single-dose oral antibiotic for the treatment of uncomplicated gonorrhea, and an evaluation of the PK-PD profile of ZEVTERA® (ceftobiprole medocaril sodium for injection) infusion dosing regimens in patients with Staphylococcus aureus bacteremia (SAB). Innoviva Specialty Therapeutics will deliver the subset analysis of the zoliflodacin Phase 3 trial data in collaboration with its not-for-profit development partner, the Global Antibiotic Research & Development Partnership (GARDP), which sponsored and led the study. “The breadth and depth of data we’re presenting reflects our strong commitment to addressing serious infectious diseases through innovation and scientific rigor,” said David Altarac, M.D., Chief Medical Officer at Innoviva Specialty Therapeutics. “From advancing novel therapies like zoliflodacin, to optimizing the use of antibiotic agents such as ceftobiprole, our presentations underscore our focus on improving outcomes for patients facing high-risk infections, including drug-resistant pathogens and critical care challenges.” IDWeek is a joint annual meeting organized by a collaboration of professional organizations: the Infectious Diseases Society of America (IDSA), the Society for Healthcare Epidemiology of America (SHEA), the HIV Medicine Association (HIVMA), the Pediatric Infectious Diseases Society (PIDS), and the Society of Infectious Diseases Pharmacists (SIDP). ID Week 2025 Abstracts and Presentations Oral presentation Sulbactam- Durlobactam Abstract Title: Population Pharmacokinetics (PPK) Analysis of Sulbactam-Durlobactam (SUD) to Support Dose Selection for Evaluation in a Clinical Trial in Pediatric Patients with Acinetobacter baumannii-Calcoaceticus Complex (ABC) Infections​ Abstract Title: Pharmacokinetic-Pharmacodynamic (PK-PD) Target Attainment Analyses to Support Ceftobiprole Continuous Infusion Dosing Regimens for Patients with Staphylococcus aureus Bacteremia (SAB)​ Presenters: Sujata M. Bhavnani Abstract Title: Population Pharmacokinetics (PPK) Analysis of Eravacycline (ERV) to Support Dose Selection for a Trial in Pediatric Patients Aged 8 to Less Than 18 Years with Complicated Intra-Abdominal Infection (cIAI). ​ For additional information or to speak with a Medical Affairs or Commercial team representative, please stop by ID Week booth #1231 or go to, www.innovivaspecailtytherapeutics.com, and follow us on LinkedIn and X. About ZEVTERA® (ceftobiprole medocaril sodium for injection) Ceftobiprole, the active moiety of the prodrug ceftobiprole medocaril, is an advanced-generation cephalosporin antibiotic for intravenous administration, with rapid bactericidal activity against a wide range of Gram-positive bacteria, such as Staphylococcus aureus, including methicillin-resistant strains (MRSA), and Gram-negative bacteria. Outside the U.S., the brand is currently approved and marketed in several European countries and beyond as ZEVTERA® and Mabelio® for the treatment of adult patients with hospital-acquired bacterial pneumonia (HABP), excluding ventilator-associated bacterial pneumonia (VABP), and for the treatment of community-acquired bacterial pneumonia (CABP). Basilea has entered into license and distribution agreements covering more than 80 countries. INDICATIONS & USAGE Indications ZEVTERA® (ceftobiprole medocaril sodium for injection), for intravenous use, is indicated for the treatment of: Adult patients with Staphylococcus aureus bloodstream infections (bacteremia) (SAB), including those with right-sided infective endocarditis, caused by methicillin-susceptible and methicillin-resistant isolates. Adult patients with acute bacterial skin and skin structure infections (ABSSSI) caused by susceptible isolates of the following gram-positive and gram-negative microorganisms: Staphylococcus aureus (methicillin-susceptible and methicillin-resistant isolates), Streptococcus pyogenes, and Klebsiella pneumoniae. Adult and pediatric patients (3 months to less than 18 years) with community-acquired bacterial pneumonia (CABP) caused by susceptible isolates of the following gram-positive and gram-negative microorganisms: Staphylococcus aureus (methicillin- susceptible isolates), Streptococcus pneumoniae, Haemophilus influenzae, Haemophilus parainfluenzae, Escherichia coli, and Klebsiella pneumoniae. Usage To reduce the development of drug-resistant bacteria and maintain the effectiveness of ZEVTERA and other antibacterial drugs, ZEVTERA should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. IMPORTANT SAFETY INFORMATION Contraindications: ZEVTERA is contraindicated in patients with a known history of severe hypersensitivity to ZEVTERA, or to other members of the cephalosporin class. Warnings and Precautions: Increased mortality with unapproved use in ventilator-associated bacterial pneumonia (VABP) Patients: The safety and effectiveness of ZEVTERA for the treatment of VABP has not been established and the use of ZEVTERA for VABP is not approved. Serious hypersensitivity reactions, including anaphylaxis, were observed in ZEVTERA-treated patients in clinical trials. Serious and occasionally fatal hypersensitivity reactions and serious skin reactions have been reported in patients receiving beta-lactam antibacterial drugs. Before therapy with ZEVTERA is instituted, careful inquiry about previous hypersensitivity reactions to other cephalosporins, penicillins, or other beta-lactam antibacterial drugs should be made. Maintain clinical supervision if this product is to be given to a penicillin- or other beta-lactam-allergic patient, because cross sensitivity among beta-lactam antibacterial agents has been established. Discontinue ZEVTERA if a hypersensitivity reaction occurs, and institute appropriate treatment. Seizures and other adverse central nervous system (CNS) reactions have been reported during treatment with ZEVTERA and other cephalosporins. If CNS adverse reactions, including seizures, occur, evaluate patients to determine whether ZEVTERA should be discontinued. Clostridioides difficile-associated diarrhea (CDAD) has been reported with nearly all systemic antibacterial agents, including ZEVTERA, and may range in severity from mild diarrhea to fatal colitis. If CDAD is suspected or confirmed, the risk/benefit of continuing treatment with ZEVTERA should be assessed. Adverse Reactions: SAB (adult patients): The most common adverse reactions occurring in ≥ 2% of adult patients were anemia, nausea, hypokalemia, vomiting, hepatic enzyme and bilirubin increased, diarrhea, blood creatinine increased, hypertension, leukopenia, pyrexia, abdominal pain, fungal infection, headache, and dyspnea. ABSSSI (adult patients): The most common adverse reactions occurring in ≥ 2% of adult patients were nausea, diarrhea, headache, injection site reaction, hepatic enzyme increase, rash, vomiting, and dysgeusia. CABP (adult and pediatric patients 3 months to less than 18 years of age): Adult Patients: The most common adverse reactions occurring in ≥ 2% of adult patients were nausea, hepatic enzyme increased, vomiting, diarrhea, headache, rash, insomnia, abdominal pain, phlebitis, hypertension, and dizziness. Pediatric Patients: The most common adverse reactions occurring in ≥ 2% of pediatric patients were vomiting, headache, hepatic enzyme increased, diarrhea, infusion site reaction, phlebitis, and pyrexia. To report suspected adverse reactions, contact Innoviva Specialty Therapeutics, Inc. at 1‑800‑651‑3861 (medinfo@istx.com) or the FDA at 1-800-FDA-1088 or fda.gov/medwatch. For full prescribing information, go to: https://innovivaspecialtytherapeutics.com/wp-content/uploads/2025/05/Prescribing-Information-Zevtera.pdf About Innoviva Specialty Therapeutics Innoviva Specialty Therapeutics, a subsidiary of Innoviva, Inc., is focused on delivering innovative therapies in critical care and infectious disease. Innoviva Specialty Therapeutics’ products, through its affiliate, La Jolla Pharmaceutical Company, include GIAPREZA® (angiotensin II), approved to increase blood pressure in adults with septic or other distributive shock, and XERAVA® (eravacycline) for the treatment of complicated intra-abdominal infections in adults. Innoviva Specialty Therapeutics’ products, through its affiliate, Entasis Therapeutics Inc., include XACDURO® (sulbactam for injection; durlobactam for injection), co-packaged for intravenous use approved for the treatment of adults with hospital-acquired bacterial pneumonia and ventilator-associated bacterial pneumonia caused by susceptible strains of Acinetobacter baumannii-calcoaceticus complex (Acinetobacter). ZEVTERA® (ceftobiprole) is the only FDA-approved cephalosporin specifically designed to treat adult patients with acute bacterial skin and skin structure infections (ABSSSI), adult patients with Staphylococcus aureus bloodstream infections (bacteremia) including those with right-sided infective endocarditis, and adult and pediatric patients (3 months to less than 18 years old) with community-acquired bacterial pneumonia (CABP). The Company’s clinical pipeline includes zoliflodacin, an investigational antibiotic for uncomplicated gonorrhea, which is being developed in collaboration with the Global Antibiotic Research and Development Partnership (GARDP), and is currently under review by the U.S. Food and Drug Administration. For more information about Innoviva Specialty Therapeutics, please visit here. Forward Looking Statements This press release contains certain “forward-looking” statements as that term is defined in the Private Securities Litigation Reform Act of 1995 regarding, among other things, statements relating to goals, plans, objectives, and future events. Innoviva intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. The words “anticipate”, “expect”, “goal”, “intend”, “objective”, “opportunity”, “plan”, “potential”, “target” and similar expressions are intended to identify such forward-looking statements. Such forward-looking statements involve substantial risks, uncertainties, and assumptions. These statements are based on the current estimates and assumptions of the management of Innoviva as of the date of this press release and are subject to known and unknown risks, uncertainties, changes in circumstances, assumptions and other factors that may cause the actual results of Innoviva to be materially different from those reflected in the forward-looking statements. Important factors that could cause actual results to differ materially from those indicated by such forward-looking statements include, among others, risks related to: expected cost savings; lower than expected future royalty revenue from respiratory products partnered with GSK; the commercialization of RELVAR®/BREO® ELLIPTA®, ANORO® ELLIPTA® and, formerly, TRELEGY® ELLIPTA® in the jurisdictions in which these products have been approved; the strategies, plans and objectives of Innoviva (including Innoviva’s growth strategy and corporate development initiatives beyond the existing respiratory portfolio); the timing, manner, and amount of potential capital returns to shareholders; the status and timing of clinical studies, data analysis and communication of results; the potential benefits and mechanisms of action of product candidates; expectations for product candidates through development and commercialization; the timing of regulatory approval of product candidates; and projections of revenue, expenses and other financial items; the impact of the novel coronavirus (COVID-19). Other risks affecting Innoviva are described under the headings “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in Innoviva’s Annual Report on Form 10-K for the year ended December 31, 2022 and Quarterly Reports on Form 10-Q, which are on file with the Securities and Exchange Commission (SEC) and available on the SEC’s website at www.sec.gov. Past performance is not necessarily indicative of future results. No forward-looking statements can be guaranteed, and actual results may differ materially from such statements. Given these uncertainties, you should not place undue reliance on these forward-looking statements. The information in this press release is provided only as of the date hereof, and Innoviva assumes no obligation to update its forward-looking statements on account of new information, future events or otherwise, except as required by law. Media Contact: David Patti Corporate Communications Innoviva, Inc. 908.421-5971 david.patti@inva.com