Clinical experts, scientists and experienced managers synergistically cultivate CannaXan.

Our scientific advisory board:


Prof. Dr. med. Dr. h.c. Walter Zieglgänsberger

Chairman, pain

  • Emeritus Professor of Clinical Neuropharmacology at the Max Planck Institute for Psychiatry in Munich
  • Leading scientist in pain and addiction research
  • Winner of The Order of Merit of the Federal Republic of Germany, 1st Class
  • 2-time winner of the German Pain Award
  • Founding member of various professional associations
  • Reviewer and member of the editorial board for numerous international journals, including Reviewing Editor for Science

Prof. Dr. pharm. Rudolf Brenneisen


  • Professor Emeritus at the University of Bern for Pharmacy
  • 40 years of experience in cannabis pharmacology
  • Advisor to the Swiss government for cannabis
  • Head of the Swiss Task Force for Cannabinoids in Medicine
  • Head of the Swiss Committee for Drugs of Abuse Testing
  • Secretary General of the Swiss Academy for Pharmaceutical Sciences
  • Editor-in-Chief of "Medical Cannabis and Cannabinoids"

Prof. Dr. med. Dan Ziegler

Diabetic polyneuropathy

  • Deputy Director of the German Diabetes Centre
  • Specialist in diabetic neuropathy
  • Member of expert committees for developing guidelines for national diabetes societies: DDG: Diabetic Neuropathy and ADA:

Prof. Dr. med. Stefan Lorenzl

Spasticity, palliative care, Parkinson's

  • Chief Physician for Neurology at Agatharied Hospital (LMU Munich)
  • Professor of Palliative Medicine at Paracelsus University, Salzburg
  • Focus's TOP Medic for Parkinson's
  • Author of over 100 scientific publications
  • Over 200 scientific lectures given in the past 5 years
  • Member of several professional associations
  • Together with Prof. Rolke, Head of the Palliative Medicine Working Group of the German Society for Neurology

Prof. Dr. med. Kirsten Müller-Vahl


  • Senior Physician for Neurology at the Hannover Medical School
  • Head of the Tourette's Group at the Hannover Medical School
  • Long-time expert in the treatment of Tourette's with cannabis

Prof. Dr. med. Borwin Bandelow

Anxiety disorder

  • Professor Emeritus for Neurology and Psychiatry, University of Göttingen
  • Author of numerous publications and books
  • Focus's TOP Doctor for anxiety disorders in 2019
  • Founder and Honorary Chairman of Gesellschaft für Angstforschung e.V. (Society for Anxiety Research)
  • Named by Cicero magazine as one of the most important German-speaking intellectuals

Retired State Pharmaceutical Director, Hartmut


  • Longstanding Head of the Central Pharmacy of the LWL Klinik, Dortmund
  • Longstanding Technical Chairman of the Pharmaceutical Commission of the Regional Association of Westphalia-Lippe (LWL)
  • Extensive experience in pharmacological work
  • Numerous publications, lectures, and author of 8 specialist books
  • Longstanding Lecturer for Specialist Further Training in psychiatry, geriatric pharmacy
  • Advanced pharmacological training for doctors, pharmacists, nursing staff
  • Performs clinical ward rounds to psychiatric facilities nationwide
  • Workshop management for "Meet the Expert"
  • Expert in differentiated pharmacological clinical questions

Prof. Dr. Beat Lutz

Endocannabinoid system

  • Director of the Institute of Physiological Chemistry at Johannes Gutenberg University, Mainz
  • World-renowned expert in the endocannabinoid system
  • Author of numerous publications, including in Nature, Science and Neuroscience
  • Chair of the Gordon Conference "Cannabinoid Functions in the CN: 2011"
  • Chairman of DFG research area FOR926 (together with Prof. A. Zimmer, Bonn): 2008–2014

PD Dr. Carsten Wotjak

Anxiety disorder, endocannabinoid system

  • Group Leader at the Max Planck Institute for Psychiatry, Stress, Neurobiology & Neurogenetics
  • Expert in anxiety disorder and its pathogenesis
  • Expert in the role of the endocannabinoid system in fear and anxiety
  • Author of numerous publications in leading international scientific journals

Prof. Dr. med. Kai G. Kahl

Anxiety disorder, mood/affective disorders

  • Executive Senior Physician at the Clinic for Psychiatry, Social Psychiatry and Psychotherapy at the Hannover Medical School
  • Medical Director of the Training Institute for Behavioural Therapy and Behavioural Medicine (AVVM), Supervisor
  • Head of the research group "Brain, Heart and Mental Illness"
  • Head of the AGNP working group "Polypharmacy"
  • Clinical and scientific expertise in mood/affective disorders and personality disorders. Specialisation in borderline disorders

Prof. Dr. med. Michael Kellner

Anxiety and obsessive-compulsive disorder

  • Chief Physician of the Clinic for Psychiatry, Psychotherapy & Psychosomatics at the Herford Clinic (teaching hospital of the Ruhr University, Bochum)
  • Professor at the University Medical Centre, Hamburg-Eppendorf
  • Member of the S3 Guidelines Commission for Anxiety Disorders
  • 2011–2019 Top Medic for Anxiety Disorders (Focus list)
  • Established the Panic and Anxiety Outpatient Clinic at the MPI in Munich
  • Established the first German Federal specialist outpatient clinic for post-traumatic stress disorders in Hamburg
  • Author of well over 100 international peer-reviewed publications on panic and anxiety disorders, post-traumatic stress disorder, depression, obsessive-compulsive disorder; specialisation in psychoneuroendocrinology, psychopharmacology and experimental psychopathology
  • Indications: anxiety disorders, obsessive-compulsive disorder, post-traumatic stress disorder, depression

Manager from CannaXan


Dr. Werner Brand

Management, Head of Clinical Trials

  • Founder and Managing Director of CannaXan GmbH
  • Active as an entrepreneur since 2007: founder of five pharmaceutical companies (including Apurano Pharmaceuticals GmbH)
  • Inventor of five patent families and the PuranoTec manufacturing method
  • Many years of experience in management positions in companies in the automotive, process engineering and consulting sectors
  • Studied aerospace engineering at the Technical University of Munich & the University of Manchester (UK), Northwestern University (USA), doctorate at the University of Sheffield

Dr. Mathias Schmidt

Head of Quality Management

  • Over 30 years of experience as a specialist in various pharmaceutical companies
  • Recognised expert in herbal medicine and quality control
  • Authority on herbal medicines
  • Member of various pharmaceutical companies
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Stefan Gähler-Brand

Head of Supply Chain Management

  • Four years of experience in operations and quality management in the pharmaceutical industry
  • 15 years of experience in supply chain management and quality management in various sectors

CannaXan GmbH

Birkerfeld 12
83627 Warngau

+49 8024 46869 70

Bei Fragen zu Bestellungen:
+49 8024 46869 80

+49 8024 46869 99