FRANKFURT, Germany & RALEIGH, N.C.--(BUSINESS WIRE)--Merz Therapeutics, a leading player in neurology-focused specialty pharma, today announced the presentation of new research at the World Parkinson Congress (WPC) 2026 that uncovers the multifaceted burden of "OFF" episodes in Parkinson's disease (PD). The qualitative literature review demonstrates that these episodes are not only a re-emergence of motor symptoms, but also a complex mix of debilitating motor and non-motor symptoms that impact