Recently, it is believed that single nucleotide polymorphisms (SNPs) in the BDNF gene is associated with several neuropsychiatric morbidities such as schizophrenia, depression, ADHD and BD.[8–13] One of the most reported, as well as most functional, SNPs in the BDNF gene is rs6265. This evidence concerns the gene BDNF and attention deficit-hyperactivity disorder.