Rapid degradation of oseltamivir phosphate in clinical samples by plasma esterases.

نویسندگان

  • Niklas Lindegardh
  • Geraint R Davies
  • Tinh Hien Tran
  • Jeremy Farrar
  • Pratap Singhasivanon
  • Nicholas P J Day
  • Nicholas J White
چکیده

The anti-influenza drug oseltamivir is an ester prodrug activated by hepatic carboxylesterases. Plasma esterases also convert up to 31.8% of the parent compound to the active metabolite after 4 h ex vivo, with wide interindividual variation. This source of error is removed by adding the esterase inhibitor dichlorvos to blood collection tubes.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Analytical Methodologies for the Determination of Oseltamivir

Oseltamivir phosphate is an antiviral drug used in the treatment and prophylaxis of both influenza virus A and influenza virus B. Oseltamivir phosphate is an ethyl ester pro-drug that is rapidly and extensively metabolized by esterases in the gastrointestinal tract and liver to its active form, oseltamivir carboxylate. There are some analytical methods in the literature for the analysis of both...

متن کامل

Simultaneous quantification of prodrug oseltamivir and its metabolite oseltamivir carboxylate in human plasma by LC–MS/MS to support a bioequivalence study

A simple, precise and rapid liquid chromatography-tandem mass spectrometry (LC-MS/MS) method has been developed and validated for the simultaneous determination of oseltamivir and oseltamivir carboxylate, a neuraminidase inhibitor, using their deuterated analogs as internal standards (ISs). The method involved solid phase extraction of the analytes and ISs from 200 μL human plasma with no recon...

متن کامل

Pharmacokinetics of oseltamivir in breast milk and maternal plasma.

OBJECTIVE Women in the postpartum period are at high risk for complications from influenza. Pharmacokinetic data of oseltamivir phosphate in postpartum women, however, are lacking. STUDY DESIGN Seven healthy patients within 48 hours of delivery were recruited. Each woman received 75 mg of oseltamivir phosphate. Plasma and breast milk samples were obtained at times 0, 0.5, 1, 2, 4, 8, 12, and ...

متن کامل

Kinetic Study of the Alkaline Degradation of Oseltamivir Phosphate and Valacyclovir Hydrochloride using Validated Stability Indicating HPLC

Aqueous alkaline degradation was performed for oseltamivir phosphate (OP) and valacyclovir hydrochloride (VA). Isocratic stability indicating the use of high-performance liquid chromatography (HPLC) was presented for each drug in the presence of its degradation product. The separations were performed using the Nucleosil ODS column and a mobile phase consisting of phosphate buffer (pH = 7), acet...

متن کامل

Pharmacokinetics of oseltamivir: an oral antiviral for the treatment and prophylaxis of influenza in diverse populations

Influenza is a transmissible viral pathogen that continues to cause substantial morbidity and mortality. Oseltamivir is an orally administered antiviral medication that selectively inhibits the influenza neuraminidase enzymes that are essential for viral replication. Treatment of infected children > or =1 year and adults of all ages may decrease the severity and duration of the symptoms of infe...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Antimicrobial agents and chemotherapy

دوره 50 9  شماره 

صفحات  -

تاریخ انتشار 2006