Common emotional and behavioural symptoms include tearfulness, depression, mood swings, irritability, a feeling of unease, disturbed sleep, food cravings (especially for sweet things), loss of self-control, aggression, fatigue and lethargy.

Together, they put the emphasis squarely on the character's specific behavioural symptoms, on the particular manifestations of their various ills.

The study showed that 20 mg/day improved cognition, functional ability and behavioural symptoms in patient population.

Behaviourists reject this criticism and claim that we need not look beyond the behavioural symptoms as the symptoms are the disorder.