BDNF and Cognitive impairment: This is a study focusing on associations between Brain‐Derived Neurotrophic Factor (BDNF) single nucleotide polymorphism, plasma Levels, and cognitive impairment in Chinese patients with panic disorder (PD).We found the BDNF Met/Met genotype may be associated with lower BDNF plasma levels and some domains of cognitive impairments in PD patients.