the Atkins Diet. The mechanism of action is not well understood. It is unclear whether the benefits of the diet produce a lasting improvement in symptoms (as is sometimes the case in treatment for epilepsy) or whether the diet would need to be continued indefinitely to maintain symptom remission. The role of cannabinoids Acute cannabis intoxication transiently produces perceptual distortions, psychotic symptoms and reduction in cognitive abilities in healthy persons and in severe mental disorder, and may impair the ability to safely operate a motor vehicle. Cannabis use is common in bipolar disorder; and is a risk factor for a more severe course of the disease by increasing frequency and duration of episodes. It is also reported to reduce age at onset. Alternative medicine Several studies have suggested that omega-3 fatty acids may have beneficial effects on depressive symptoms, but not manic symptoms. However, only a few small studies of variable quality have been published and there is not enough evidence to draw any firm conclusions. See also Self-medication International Society for Bipolar Disorders References Further reading External links Bipolar disorder