Provided are methods for ameliorating a symptom of a
neuropsychiatric disorder in a subject. Also provided are methods for ameliorating at least one physical symptom or at least one psychological symptom resulting from tobacco cessation in a subject, methods for ameliorating a symptom of Alzheimer's
disease or other
cognitive disorder in a subject, methods for ameliorating a symptom of
schizophrenia,
schizoaffective disorder, or other psychotic disorder in a subject, methods for ameliorating a symptom of a depressive disorder in a subject, methods for ameliorating a symptom of bipolar disorder in a subject, methods for ameliorating a symptom of post-traumatic stress disorder or other
anxiety disorder in a subject, methods for predicting a predisposition to suicide, suicidal ideation, suicidal behavior, or a combination thereof in a subject, methods for ameliorating a symptom of a
pain disorder in a subject, methods for ameliorating a neurodegenerative disorder in a subject, methods for ameliorating a symptom of
traumatic brain injury in a subject, methods for ameliorating a
sleep disorder in a subject, and methods for improving cognitive functioning in a subject. In some embodiments, the methods include administering to a subject in need thereof an effective amount of a
neuroactive steroid composition comprising
pregnenolone (PG), allopregnanolone (ALLO),
dehydroepiandrosterone (DHEA), progesterone (PROG), precursors thereof, metabolites thereof, pharmaceutically acceptable salts thereof, derivatives thereof, or combinations thereof.