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Psychiatr Danub. 2019 Jun;31(Suppl 2):148-152.

Hyperprolactinemia - side effect or part of the illness.

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Psychiatric Hospital "Sveti Ivan", Jankomir 11, 10090 Zagreb, Croatia,



Hyperprolactinemia is associated with side effect of antipsychotics in people suffering from psychotic disorders. However, increased prolactin levels (mlU/L) were found in patients suffering from the first psychotic episode who were not receiving antipsychotic therapy. The assumption of this study is that the abnormality in the level of prolactin is associated with the effect and influence of the disease, not the therapy that is carried out.


Study involved 54 female patients hospitalized in Psychiatric hospital "Sveti Ivan", whose average age was 33.9 years. All patients had been diagnosed with a psychotic disorder (according to MKB-10, F20-F29). 18 patients had their first psychotic episode, while 36 patients had relapses of psychotic disorder. The methods used were: PANSS scale and measurement of prolactin concentration (Immunoanalyzer ACCESS 2, CLIA method). Arithmetic mean, standard deviations, correlation coefficient, Mann Whitney U test and the chi-squared test were used.


75.5% of patients had prolactin values above the reference values (min 121, max 4192 ml/L). In a sample of patients with first psychotic episode, 77.8% had elevated prolactin levels, while among re-hospitalized patients, elevated levels had 74.2%. Statistically significant results were obtained: patients with higher pronounced symptoms had higher prolactin values, especially particles on PANSS: P1 (delusions), N4 (Apathy), G15 (preoccupation) and G16 (active avoidance).


Elevated prolactin in patients has been demonstrated regardless of antipsychotic therapy, therefore the question of etiology of hyperprolactinemia in psychotic disorders is questionable. The association of hyperprolactinemia with the severity of the clinical picture has also been demonstrated, higher prolactin values indicating a stronger clinical picture, which calls into question the protective role of prolactin in psychotic disorders.

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