The Speakers of the Circle of Experts.

Prof. Dr. mult. Eckhard Nagel is Managing Director of the Institute of Medical Management and Health Sciences at the University of Bayreuth. At the Circle of Experts, he examines the ethical aspects of medical cannabis therapy and advocates for real-world studies.

Prof. Dr. med. Thomas Herdegen is a specialist in pharmacology and toxicology and was for many years deputy head of the Institute of Experimental and Clinical Pharmacology at UKSH Kiel. He is co-author of the Cannabis practice guideline and recipient of the German Pain Award 2024.

Dr. med. Dipl.-Chem. Konrad F. Cimander is a specialist in general and addiction medicine, heads the K.C.M. Hannover Competence Center for cannabis medicine and is President of the German Medical Cannabis Society (DMCG). He is a lecturer on addiction medicine, psychopharmacology and cannabis medicine.

Prof. Dr. med. Kirsten Müller-Vahl is a specialist in neurology and psychiatry at the MHH and chairwoman of the ACM and IACM. She leads randomized controlled trials on cannabinoids in Tourette syndrome and tic disorders.

Prof. Dr. med. Sven Gottschling is head physician of the Center for Cross-Age Palliative Care and Pediatric Pain Therapy at Saarland University Medical Center. He has over 25 years of experience with cannabis prescriptions in palliative and pain therapy.

Dr. Christiane Neubaur is a pharmacist and Managing Director of the Association of Cannabis-Dispensing Pharmacies (VCA). She hosts the podcasts „VCA Hanf Gespräch“ and „ArztCann“ and is co-author of the non-fiction book „Cannabis – Heilkraft der Natur“.

Dr. Matthias Giesel is a specialist in anesthesiology and heads the pain clinic at Marienkrankenhaus Soest as well as the practice for pain therapy and palliative medicine at the Hospitalverbund MVZ Soest. He works as a consultant to the pharmaceutical industry on medicinal cannabis.

Dr. med. Daniel Huse is a specialist in anesthesiology with a focus on pain management, palliative and osteopathic medicine. In his private practice in Remagen, medical cannabis has been an integral part of treating chronic pain since 2017.

Johannes Hoffmann is a pharmacist and founder of the Alle Farben Apotheke (Schreibersche Apotheke Melle), specializing in medical cannabis with flowers, extracts and bespoke compounded formulations – particularly for palliative care.

Sascha Saßen holds a degree in nursing management (Diplom-Pflegewirt), is a certified pain expert (CEKIP) and has been CEO of the hesena Group since April 2025. At the Circle of Experts he spoke on pain management in inpatient long-term care and on the medication process in nursing and palliative care.

Nicolas C. Enriquez is a health and pediatric nurse and a lecturer for nursing professions. With a Master's in Health Care Administration, he works as a freelance consultant on clinical research and the evidence-based use of medical cannabis.

Dr. André Ihlenfeld is a specialist in anesthesiology and a pain physician, as well as Medical Director at Copeia, where he is responsible for projects on patient-reported data collection under cannabis therapy (including the Physicians Experience Platform). He is co-author of publications on cannabis-based medicines.