January 27, 2015
Not intended for U.S. and UK Media

Bayer Forms Collaboration with Academic and Governmental Institutions for Rivaroxaban Study in Patients with a recent Embolic Stroke of Undetermined Source

Embolic stroke of undetermined source is caused by a blood clot, and affects approximately 300,000 people each year in North America and Europe / Phase III NAVIGATE ESUS study will investigate once-daily rivaroxaban for the secondary prevention of stroke in approximately 7,000 patients / Indication-seeking trial will be conducted in partnership with Population Health Research Institute and Canadian Stroke Prevention Intervention Network
Berlin, January 27, 2015 - Bayer HealthCare, in partnership with its
development partner Janssen Research & Development, LLC, announced today a
collaboration with the Population Health Research Institute (PHRI) and the
Canadian Stroke Prevention Intervention Network (C-SPIN) to conduct the global
Phase III NAVIGATE ESUS study. The study will investigate the benefits of the
once-daily, novel oral anticoagulant rivaroxaban in approximately 7,000
patients with a recent embolic stroke of undetermined source (ESUS). Enrollment
of patients for the study has started successfully.

Annually, an estimated 300,000 people suffer from ESUS in North America and
Europe alone. Preventing recurrence of stroke in patients with a recent ESUS is
an important unmet medical need as the risk of recurrent stroke in patients on
guideline-recommended antiplatelet(s) including acetylsalicylic acid (ASA),
clopidogrel or ASA plus dipyridamole is three to six per cent per year.

ESUS accounts for approximately 25 per cent of all ischaemic strokes, yet the
underlying cause of the ischaemic stroke cannot be identified by standard
diagnostic assessments in these patients. Although there is limited knowledge
or data on which to guide treatment decisions for secondary prevention, more
recent information indicates that most of these strokes are due to a blood clot
that has travelled to the brain from another location in the body (embolus).

"Based on our knowledge and the clinical utility of the novel oral
anticoagulants in patients with atrial fibrillation, we assume that they will
be more efficacious than antiplatelet therapy for the secondary prevention of
ESUS," said Co-Principal Investigator Dr Stuart Connolly, M.D.,FRCPC, Professor
of Medicine (Cardiology), McMaster University, Hamilton, Ontario, Canada and
Member of the Executive Committee of C-SPIN. "Through this partnership between
the PHRI, C-SPIN, Bayer HealthCare and Janssen, we are now able to initiate the
randomised clinical research and are committed to finding innovative ways to
reduce the incidence of recurrent stroke."

"The ROCKET AF study confirmed that once-daily rivaroxaban is highly effective
in preventing stroke in patients with non-valvular atrial fibrillation, with
and without previous stroke or transient ischaemic attack, so we believe there
is potential for rivaroxaban to provide a similar protective benefit to
patients with a recent ESUS," said Dr Joerg Moeller, Member of the Bayer
HealthCare Executive Committee and Head of Global Development. "Rivaroxaban is
already approved to prevent and treat more venous and arterial thromboembolic
conditions than any other novel oral anticoagulant, and it has the potential to
benefit even more patients at risk of the serious and often life-threatening
conditions caused by blood clots."

The NAVIGATE ESUS study will contribute important knowledge to the extensive
evaluation of rivaroxaban, a program that - by the time of its completion - is
expected to include more than 275,000 patients in both clinical trials and real
world settings.


NAVIGATE ESUS is a randomised double-blind, event-driven superiority Phase III
study of secondary prevention of stroke and prevention of systemic embolism in
patients with a recent embolic stroke of undetermined source (ESUS). The study
will include approximately 7,000 patients from 350 sites, across more than 25
countries worldwide. The primary efficacy outcome is the composite of the first
occurrence of all recurrent strokes (ischaemic, hemorrhagic, and undefined
stroke, and transient ischaemic attack (TIA) with positive neuroimaging) and
systemic embolism. The primary safety outcome is modified ISTH major bleeding.
Patients will be randomised to receive either rivaroxaban 15mg once daily or
acetylsalicylic acid (ASA) 100mg once daily.

About the Population Health Research Institute (PHRI)

Based in Hamilton, Ontario, Canada, PHRI is Canada's premiere global health
research institute and a world leader in large clinical trials and population
studies. Originally formed with a focus on cardiovascular disease (CVD) and
diabetes, PHRI's research areas have broadened to include population genomics,
perioperative medicine, stroke, thrombosis, CV surgery, renal disease, obesity,
childhood obesity, bone and trauma and implementation science. Over the years,
the PHRI has developed outstanding expertise in epidemiology, population health
and clinical trials. Examining biological and genetic determinants of health,
as well as social, environmental and policy factors, the research focuses on
the prevention of cardiovascular disease, diabetes and other common conditions.
To date, PHRI studies have enrolled almost 1,000,000 participants worldwide.
More information can be found at www.phri.ca.

About The Canadian Stroke Prevention Intervention Network (C-SPIN)

The Canadian Stroke Prevention Intervention Network (C-SPIN) is funded by the
Canadian Institutes of Health Research (CIHR) and the Heart and Stroke
Foundation of Canada. C-SPIN is a network of highly experienced members from a
wide-range of scientific backgrounds, including medicine, surgery, nursing,
pharmacy, population health and social sciences who aim to develop integrated
stroke-prevention strategies to reduce the incidence of embolic stroke in
Canada by ten per cent within ten years and address the specific challenges
facing this population.

About Xarelto® (Rivaroxaban)

Rivaroxaban is the most broadly indicated novel oral anticoagulant and is
marketed under the brand name Xarelto®. Xarelto is approved for five
indications across seven distinct areas of use, protecting patients across more
venous and arterial thromboembolic (VAT) conditions than any other novel oral

- The prevention of stroke and systemic embolism in adult patients with
non-valvular atrial fibrillation (AF) with one or more risk factors

- The treatment of deep vein thrombosis (DVT) in adults

- The treatment of pulmonary embolism (PE) in adults

- The prevention of recurrent DVT and PE in adults

- The prevention of venous thromboembolism (VTE) in adult patients undergoing
elective hip replacement surgery

- The prevention of VTE in adult patients undergoing elective knee replacement

- The prevention of atherothrombotic events (cardiovascular death, myocardial
infarction or stroke) after an Acute Coronary Syndrome in adult patients with
elevated cardiac biomarkers and no prior stroke or transient ischaemic attack
(TIA) when co-administered with acetylsalicylic acid (ASA) alone or with ASA
plus clopidogrel or ticlopidine

Whilst licences may differ from country to country, across all indications
Xarelto is approved in more than 125 countries.

Rivaroxaban was discovered by Bayer HealthCare, and is being jointly developed
with Janssen Research & Development, LLC. Xarelto is marketed outside the U.S.
by Bayer HealthCare and in the U.S. by Janssen Pharmaceuticals, Inc. (a Johnson
& Johnson Company).

Anticoagulant medicines are potent therapies used to prevent or treat serious
illnesses and potentially life-threatening conditions. Before initiating
therapy with anticoagulant medicines, physicians should carefully assess the
benefit and risk for the individual patient.

Responsible use of Xarelto is a very high priority for Bayer, and the company
has developed a Prescribers Guide for physicians and a Xarelto Patient Card for
patients to support best practice.

To learn more, please visit https://prescribe.xarelto.com
To learn more about thrombosis, please visit www.thrombosisadviser.com
To learn more about Xarelto, please visit www.xarelto.com
To learn more about the NAVIGATE ESUS study, please visit

About Aspirin®

Acetylsalicylic acid, the active ingredient in Aspirin®, has been extensively
investigated in more than 200 studies involving more than 200,000 patients
across varying levels of cardiovascular (CV) risk. Given the existing body of
clinical evidence, low-dose aspirin is approved by regulatory authorities
around the world for secondary CV event prevention (i.e recurrent heart attack
and ischaemic stroke). Additionally, low-dose aspirin is approved in more than
50 countries for the prevention of a first heart attack (primary prevention) in
patients at appropriate risk.

When used as directed by a physician for its approved CV indications, aspirin
is well-tolerated, safe and effective, and, for the vast majority of patients,
is infrequently associated with clinically relevant side effects.

About Bayer HealthCare

The Bayer Group is a global enterprise with core competencies in the fields of
health care, agriculture and high-tech materials. Bayer HealthCare, a subgroup
of Bayer AG with annual sales of EUR 18.9 billion (2013), is one of the world's
leading, innovative companies in the healthcare and medical products industry
and is based in Leverkusen, Germany. The company combines the global activities
of the Animal Health, Consumer Care, Medical Care and Pharmaceuticals
divisions. Bayer HealthCare's aim is to discover, develop, manufacture and
market products that will improve human and animal health worldwide. Bayer
HealthCare has a global workforce of 56,000 employees (Dec 31, 2013) and is
represented in more than 100 countries. More information is available at

Our online press service is just a click away: press.healthcare.bayer.com

Find more information at www.bayerpharma.com.

Forward-looking statements

This release may contain forward-looking statements based on current
assumptions and forecasts made by Bayer Group or subgroup management. Various
known and unknown risks, uncertainties and other factors could lead to material
differences between the actual future results, financial situation, development
or performance of the company and the estimates given here. These factors
include those discussed in Bayer's public reports which are available on the
Bayer website at www.bayer.com. The company assumes no liability whatsoever to
update these forward-looking statements or to conform them to future events or