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Yıl:2010; Cilt: 3; Sayı: 1>> Özet
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Türkiye Klinikleri Psikiyatri Özel Dergisi; 2010;3(1):47-59
Geriatrik Psikofarmakoloji: Farmakokinetik ve Farmakodinamik Faktörler Açısından Ilaç Yanıtı
C Uluoğlu
Gazi Üniversitesi Tıp Fakültesi, Ankara
Genç hastalarla karşılaştırıldığında, geriatrik yaş grubunda psikotropik ilaçlar daha yaygın olarak kullanılmaktadır. Yaşlanma sürecinin sonuçları ve bazı ikincil faktörlerin de katkısı ile ilaç yanıtı değişmekte, ilaç advers etkileri artmakta ve uygun ilacın seçimi/uygun dozlam ileri yaş grubu için daha çok önem kazanmaktadır. Bu nedenle yaşlılarda psikotropik ilaçlar reçetelenirken, ilaç yanıtını etkileyen, farmakokinetik (absorpsiyon, dağılım, metabolizma ve atılım) ve farmakodinamik (ilaçların vücut üzerine olan etkisi) farklılıkların oluşmasına neden olabilecek değişikliklerin dikkate alınması önem taşır. Bu farklılıklar, yaşlanan organizmada ortaya çıkan fizyolojik değişimlerin sonucu olabileceği gibi, psikiyatrik soruna eklenen diğer sistemik hastalıklar, polifarmasi, ilaç-ilaç ve ilaç-bitkisel ürün (herbal) etkileşimlerinden de kaynaklanıyor olabilir. Bunun yanı sıra, yaşlılıkta ve psikiyatrik hastalıklarda sıkça gözlenen tedaviye uyum sorunu da ilaç etkisini değiştiren çok önemli diğer bir faktördür. Bu derleme, psikofarmakoloji özelinde, yaşlılarda gözlenen ilaç yanıtını, farmakokinetik ve farmakodinamik faktörler açısından ele almaktadır.
Geriatric Psychopharmacology: Drug Responce In Respect To Pharmacokinetic And Pharmacodynamic Considerations
Compared with younger patients, psychtropic drugs are more commonly used in the geriatric population. Response to drugs differ as a result of the aging process and the contribution of some secondary factors and the incidence of adverse reactions tend to increase. On the other hand, the choice of appropiate drugs and the dosage become more important for the geriatric patients. Thus, alterations in pharmacokinetics (absorption, distribution, metabolism and excretion of drugs) and pharmacodynamics (the actions of drugs on the body) which can cause changes in the effects of drugs should be considered when prescribing psychotropic drugs for elderly patients. These alterations can derive from physiologic changes that occur in the aging organism, concomitant diseases, polipharmacy, drug-drug and drug-herbal interactions. Additionally, compliance to theraphy in geriatric patients to whom a psychtropic drug is prescribed, is another important factor in drug response. This rewiev handles geriatric drug response in respect to pharmacokinetic and pharmacodynamic parameters especially for psychotropic drugs.

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