KONCENTRACIJE ITRAKONAZOLA I HIDROKSI-ITRAKONAZOLA NAKON ORALNE PRIMENE LEKA KOD ZDRAVIH LJUDI: UTICAJ POLA
Sažetak
Cilj rada je bio da se ispita uticaj pola na koncentracije itrakonazola i hidroksi-itrakonazola u plazmi zdravih odraslih osoba nakon peroralne primene leka. Sprovedena je klinička farmakokinetska studija u kojoj je učestvovalo 22 odraslih zdravih muških ispitanika i 16 ženskih kod kojih je peroralno primenjen itrakonazol u jednoj dozi od 100mg. Uzorci krvi su uzeti pre primene leka, kao i u odgovarajućim vremenskim intervalima do 72 sata nakon toga. Koncentracije leka i metabolita su određivane primenom validirane metode tečne hromatografije sa masenom spektrometrijskom detekcijom, a njihovi farmakokinetski parametri korišćenjem Kinetica programa, verzija 5.0: Cmax,Tmax,PIK(0-72),PIK(0-∞),T1/2 i Ke.
Kod ispitanica vrednosti medijane koncentracija i itrakonazola i hidroksi-itrakonazola su bile manje u odnosu na muškarce u toku celog posmatranog perioda. Takođe, izračunete vrednosti medijana parametara resorpcije – Cmax, PIK(0-72) i PIK(0-∞) su bile statistički značajno manje i za lek (p=0,005, 0,036 i 0,036) i za metabolit (p=0,004, 0,010 i 0,044) kod žena. Parametri eliminacije - T1/2 i Ke se nisu razlikovali među polovima.
Žene su nakon peroralne primene leka u manjem stepenu izložene itrakonazolu i njegovom aktivnom metabolitu u odnosu na muškarce, kao rezultat manje bioraspoloživosti ovog leka, uključujući i intenzivniji presistemski metabolizam usled veće ekspresije i/ili aktivnosti izoforme enzima koji ga metaboliše, a što bi bilo neophodno potvrditi farmakogenomskim analizama.
Reference
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