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Yıl:2012; Cilt: 23; Sayı: 4>> Özet
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Türk Psikiyatri Dergisi; 2012;23(4):281-283
Olası Valproik Asit ile Lorazepam Etkileşimine Bağlı Oluşan Stupor: İki Olgu Sunumu
Y Uz, A Hariri, H Ünübol, M Bilici
Erenköy Ruh ve Sinir Hastalıkları Eğitim ve Araştırma Hastanesi, İstanbul
Valproik asit (VPA) ve lorazepam vücuttan başlıca glukuronid konjugasyon yoluyla atılmaktadır. Bu nedenle bu iki ilacın birlikte kullanılması neticesinde, VPA lorazepamın atılımını azaltmaktadır. Bu etkileşimler sonucu nadir de olsa komaya kadar varabilen ciddi yan etkiler oluşabilmektedir. Bu yazıda VPA kullanırken tedaviye lorazepam eklenmesinden sonra gelişen iki stupor vakası sunulmuştur. İlk hasta, beş yıldır şizoafektif bozukluk tanısı ile takip edilmekteydi. Tedavide 1000 mg/gün VPA ve antipsikotik ilaçlar almaktaydı. Tedavinin yirminci gününde anksiyolitik olarak lorazepam 2,5 mg verildi. İkinci hasta, 9 yıldır şizofreni tanısı ile takip edilmekteydi. Bu hastaya antipsikotik ilaçlarla birlikte VPA 750 mg/gün başlandı. Hastaya tedavinin 8. gününde anksiyolitik ilaç olarak lorazepam 2,5 mg verildi. Yaklaşık birkaç saat sonra her iki hastada da stupor tablosu gelişti. Hastaların tüm ilaçları kesildi ve parenteral sıvı tedavisi verilmeye başlandı. İlaçlar kesildikten sonra yaklaşık 24-36 saat içinde klinik tablo düzeldi.

VPA-lorazepam etkileşiminin klinik yansıması hakkında bilgi veren çalışmalar sınırlı sayıdadır. Bununla beraber, bu iki ilacın etkileşimi sonucu stupordan komaya kadar varan durumlarla karşılaşılabileceği akılda tutulmalıdır.
Stupor Due to Possible Interaction Between Lorazepam and Valproic Acid: Report of Two Cases
Valproate (VPA) and lorazepam are excreted mainly by glucuronide conjugation. VPA reduces the excretion of lorazepam as a result of the administration of these two medications together. As a result of these interactions, even if rarely, serious adverse effects such as coma may develop. Herein, we present two cases of stupor which developed after the addition of lorazepam to treatment administered with VPA. The first patient was being followed for five [year]s with a diagnosis of schizoaffective disorder. She was subjected to a treatment of VPA at 1000 mg/day and an antipsychotic drug. On the twentieth day of the treatment, Lorazepam 2.5 mg was administered as an anxiolytic. The second patient was being followed with a diagnosis of schizophrenia for nine [year]s. A VPA treatment of 750 mg/day was initiated together with an antipsychotic treatment. On the eighth day of the treatment, Lorazepam 2.5 mg was administered. A few hours later, a stupor manifestation developed in both of the patients. Administration of the entire medication to the patients was terminated and parenteral liquid administration was initiated. The clinical profile was back to normal approximately 24-36 hours following the termination of the medication.

Studies about the clinical reflections of the VPA and Lorazepam interaction are limited. However, it must be remembered that as a result of the interaction of these two medications, conditions that vary between stupor and coma may arise.

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