Patienter med psykiatriske lidelser i anamnesen synes at have større risiko for disse alvorlige, psykiatriske bivirkninger, hvor hyppigheden af hvert af de ovenstående tilfældevarierer fra 0, 3% for maniske reaktioner til 2, 0% for både svær depression og suicidaltanker.
Patients with a history of psychiatric disorders appear to be at greater risk of these serious psychiatric adverse reactions with frequencies of each of the above events ranging from 0.3% for manic reactions to 2.0% for both severe depression and suicidal ideation.