• Adult patients with breast cancer are a prespecified subgroup of the recently conducted OnTarget trial evaluating crofelemer for prophylaxis of cancer therapy-related diarrhea
• OnTarget results in breast cancer patients have been submitted to a relevant oncology conference

SAN FRANCISCO, CA / ACCESSWIRE / October 1, 2024 / Jaguar Health, Inc. (NASDAQ:JAGX) ("Jaguar") today announced that the recently completed analysis of the prespecified subgroup of adult patients with breast cancer from the company's Phase 3 OnTarget trial indicate that crofelemer achieved statistical significance in this subgroup. Patients with breast cancer accounted for nearly 180 of the 287 participants in this unprecedented prophylactic clinical trial recently conducted by Jaguar family company Napo Pharmaceuticals for diarrhea in adult patients with solid tumors receiving targeted therapy with or without standard chemotherapy.

"The breast cancer results from OnTarget are a responder analysis, as was the primary endpoint in the phase 3 ADVENT trial that led to FDA approval of crofelemer for its currently commercialized indication for the symptomatic relief of noninfectious diarrhea in adults with HIV/AIDS on antiretroviral therapy," said Lisa Conte, Jaguar's president and CEO. "This data in breast cancer patients has been submitted to a relevant oncology conference by the study's primary investigators, and a full study report for the breast cancer results is expected to be submitted to a peer-reviewed journal. Additional analyses of OnTarget prespecified subgroups are ongoing, and we believe data from additional analyses may result in future submissions to peer-reviewed forums."

As previously announced, the initial top line results from the OnTarget study showed that the multicenter, double-blind, placebo-controlled pivotal clinical trial did not meet its primary estimand for the prespecified analysis of all tumor types. The subgroup analysis in adult breast cancer patients demonstrates that crofelemer provides clinically meaningful improvement in this patient population, and suggests that crofelemer has the potential to help breast cancer patients to better adhere to their cancer therapies.

"Crofelemer has also demonstrated clinically meaningful benefit in patients with diarrhea-predominant irritable bowel syndrome (IBS-D), specifically functional and chronic idiopathic diarrhea. Those results will be presented at the American College of Gastroenterology Annual Scientific Meeting, which takes place October 25-30, 2024 in Philadelphia. Crofelemer's unique physiological mechanism of action allows clinically meaningful benefit to patients experiencing diarrhea and other gastrointestinal symptoms from various etiologies," said Conte.

About the Jaguar Health Family of Companies

Jaguar Health, Inc. (Jaguar) is a commercial stage pharmaceuticals company focused on developing novel proprietary prescription medicines sustainably derived from plants from rainforest areas for people and animals with gastrointestinal distress, specifically associated with overactive bowel, which includes symptoms such as chronic debilitating diarrhea, urgency, bowel incontinence, and cramping pain. Jaguar family company Napo Pharmaceuticals (Napo) focuses on developing and commercializing human prescription pharmaceuticals for essential supportive care and management of neglected gastrointestinal symptoms across multiple complicated disease states. Jaguar family company Napo Therapeutics is an Italian corporation Jaguar established in Milan, Italy in 2021 focused on expanding crofelemer access in Europe and specifically for orphan and/or rare diseases. Jaguar Animal Health is a Jaguar tradename. Magdalena Biosciences, a joint venture formed by Jaguar and Filament Health Corp. that emerged from Jaguar's Entheogen Therapeutics Initiative (ETI), is focused on developing novel prescription medicines derived from plants for mental health indications.

For more information about:

Jaguar Health, visit https://jaguar.health

Napo Pharmaceuticals, visit www.napopharma.com

Napo Therapeutics, visit napotherapeutics.com

Magdalena Biosciences, visit magdalenabiosciences.com

Visit the Make Cancer Less Shitty patient advocacy program at makecancerlessshitty.com and on X, Facebook & Instagram

Forward-Looking Statements

Certain statements in this press release constitute "forward-looking statements." These include statements regarding Jaguar's expectation that a full study report for the OnTarget breast cancer results will be submitted to a peer-reviewed journal, Jaguar's expectation that data from additional analyses of OnTarget prespecified subgroups may result in future submissions to peer-reviewed forums, Jaguar's expectation that crofelemer may have the potential to help breast cancer patients to better adhere to their cancer therapies, and the expectation that crofelemer results in patients with functional and chronic idiopathic diarrhea will be presented at the 2024 American College of Gastroenterology Annual Scientific Meeting. In some cases, you can identify forward-looking statements by terms such as "may," "will," "should," "expect," "plan," "aim," "anticipate," "could," "intend," "target," "project," "contemplate," "believe," "estimate," "predict," "potential" or "continue" or the negative of these terms or other similar expressions. The forward-looking statements in this release are only predictions. Jaguar has based these forward-looking statements largely on its current expectations and projections about future events. These forward-looking statements speak only as of the date of this release and are subject to a number of risks, uncertainties and assumptions, some of which cannot be predicted or quantified and some of which are beyond Jaguar's control. Except as required by applicable law, Jaguar does not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise.

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