Beginning with non-opioid painkillers, we are leveraging our hydrogen sulfide platform to build a pipeline of anti-inflammatory drugs

As the global opioid crisis drives prescribers, patients, payors and policymakers toward non-addictive alternatives, nonsteroidal anti-inflammatory drugs ("NSAIDs") are increasingly used to treat acute pain. However, today's NSAIDs can cause gastrointestinal ("GI") ulcers and bleeding, especially at the higher doses often employed in acute indications.

Positioned as the non-opioid of choice for acute pain, our lead drug, otenaproxesul, has demonstrated profound GI safety and robust efficacy in chronic pain in Phase IIB trials. In targeting the $25+ billion1 acute pain market, Antibe aims to address a broad range of acute pain indications, including post-operative pain, acute musculoskeletal pain, dysmenorrhea, migraine, gout and dental pain.

Further leveraging our platform, the next planned addition to our pipeline targets inflammatory bowel disease, a $16 billion2 market long in need of safer, more effective treatments.

Anti-Inflammatory Drug Platform

Antibe’s platform targets inflammation by harnessing the unique properties of hydrogen sulfide to improve the safety and potency of existing anti-inflammatory medicines. More than 20 years of academic and commercial research have uncovered hydrogen sulfide’s key role in a wide range of biological functions. These include the promotion of anti-oxidant responses, activation of anti-inflammatory genes and the unique ability to substitute for oxygen to produce cellular energy, underscoring its crucial role throughout biology.3,4,5

Otenaproxesul: Lead Drug Targets an Urgent Medical Need

As the healthcare system responds to the opioid crisis, the market for acute pain therapeutics is evolving. NSAIDs, as the main alternative to opioids, are being employed more widely and have been shown to be equally effective in some acute pain settings.6,7 However, NSAIDs also triple the risk of serious gastrointestinal (“GI”) outcomes in a 14-day course of treatment.8  Antibe scientists have published Phase IIB data in the British Journal of Pharmacology indicating that naproxen, a widely used NSAID, is sixteen times more likely to cause gastric ulcers in a 14-day treatment period vs. otenaproxesul.9

Gastric Ulceration Rate 9

In addition to its remarkable GI safety, otenaproxesul has also demonstrated robust efficacy vs. placebo in a Phase IIB chronic pain trial at a high degree of statistical significance. Data from preclinical and clinical studies suggest that the drug’s potency in chronic pain is also applicable to acute pain indications. To optimize the drug for acute pain use, Antibe has developed a faster-dissolving formulation that accelerates onset of action and enhances bioavailability, enabling a lower dose and providing a potential pathway to address chronic pain indications. Otenaproxesul’s patent protection extends to 2043.
Emerging Discovery Program
In addition to fortifying the IP position of our pipeline drugs, Antibe’s research and development pursues select opportunities in next-generation anti-inflammatory medicines. The next drug planned for our pipeline targets inflammatory bowel disease (“IBD”), a condition afflicting more than three million American adults10 and long in need of safer, more effective therapies.

Otenaproxesul is licensed to three licensees for territories that include Canada, Israel and South Korea.

Second pipeline drug: ATB-352


Our second pipeline drug, ATB-352, targets the need for a non-addictive analgesic for a specialized pain indication.

ATB-352 causes negligible GI damage in rats compared to ketoprofen, a strong NSAID used for a range of pain indications.

Inflammatory Bowel Disease PROGRAM

Targeting the need for a safer and more effective therapeutic for mild-to-moderate inflammatory bowel disease (“IBD”), the next drug planned for Antibe’s pipeline aims to help patients and prescribers delay the use of expensive, adverse effect-prone immunomodulators, steroids and biologics. Lead and back-up candidates have been identified for evaluation in animal efficacy models.

Leveraging Breakthrough Science

Antibe’s drug platform reflects more than two decades of research by our founder, Dr. John L. Wallace, along with his colleagues in academic and commercial labs around the world. The research program is overseen by Scientific and Clinical Advisory Boards, comprising fifteen internationally renowned scientists and clinicians, with specialties in pharmacology, gastroenterology and a range of inflammatory diseases. Antibe strives for the most rigorous level of scientific validation—clinical studies and trials for otenaproxesul have involved more than 800 subjects to date, including 384 patients in its Phase IIB dose ranging, efficacy trial.

Our Vision

Leveraging our drug platform to include gastrointestinal and aging-related conditions—pursuing our vision for improving health and quality of life for billions of people.

Our Management Team

Antibe’s senior team is based in Toronto, Canada. We are supported by a global network of advisors and subject-matter experts covering scientific, medical, clinical and regulatory affairs, and business development.

1. Allied Market Research, Biotech Advisors, DataBridge, DelveInsight, GlobalData, Statista, Transparency Market Research, Antibe internal estimates.
2. GlobalData (2020).
3. Wallace JL and Wang R, Nature Rev Drug Discov. (2015) 14:329.

4. Zaorska E et al., Biomolecules (2020), 10, 323.
5. Olsen KR and Straub KD, (2016) Physiology 31: 60–72.
6. Lindbeck G, Prehosp Emerg Care. (2021 Dec) 20:1-17.
7. Choi et al., CMAJ 193 (24) (June 2021) E895-E905.
8. Fine M, Am J ManagCare. (2013);19(16 suppl):S267-S272.
9. Wallace JL et al., Br J Pharmacol (2019); 1-9.
10. U.S. Centers for Disease Control (2015).


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