Rare and Underestimated Association of Pulmonary Em-bolism and Olanzapine Therapy; Report of Two Cases
Venous thromboembolic disease (VTD) is a very common and severe pathological condition in which there aremany predisposing factors. Olanzapine is a drug frequently used in psychiatric practises; it is thought to increasethe risk of VTD. Here, we report two cases, a young man and a woman, with a medical history of schizophreniatreated by olanzapine who developed pulmonary embolism and we did not find any aetiologies of VTD in them.Due to the link between olanzapine and pulmonary embolism, which has been previously described, olanzapineis considered responsible for this problem. Two mechanisms have been reported in the literature in this regard;significant weight gain and lethargy, which are very common side effects of olanzapine. So far, no direct effectof olanzapine on platelet aggregation or coagulation has been found. In patients developing VTD while beingtreated with olanzapine, discontinuation of olanzapine as a treatment option must be done with an adjustmentof antipsychotic treatment and regular monitoring of psychic symptoms. Since the diagnosis of pulmonaryembolism is not easy to make in a schizophrenic patient, clinicians should take that in consideration whenprescribing these drugs and when facing clinical situations where VTD is suspected.
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