Table 1 Inclusion and exclusion criteria for patients

Inclusion criteria

 Patients of both sexes aged 18–65

 BD diagnosis in remission (HDRS < 8p, YMRS < 12)

 Regular use of recommended mood stabilizers

 Patient's consent

Exclusion criteria

 Clinically unstable medical conditions

 Mental retardation or symptoms of dementia

 Electroconvulsive therapy in the last year

 Addiction to any psychoactive substances

 Current use of sedatives (BDA and derivatives, hydroxyzine, hypnotics) or other sedative (e.g. some allergy, drugs)

 Significant vision deficits