Bhuvanachandra Pasupuleti, Vamshikrishna Gone*, Ravali Baddam, Raj Kumar Venisetty and Om Prakash Prasad Pages 1 - 6 ( 6 )
Background: Clobazam (CLBZ) metabolized primarily by Cytochrome P-450 isoenzyme CYP3A4 than with CYP2C19 , Whereas Levetiracetam (LEV) is metabolized by hydrolysis of the acetamide group . Few CYP enzymes are inhibited by Proton Pump Inhibitors (PPIs) Pantoprazole, Esomeprazole, and Rabeprazole in different extents that could affect drug concentrations in the blood [13-19]. The aim of the present study was to evaluate the effect of these PPIs on the plasma concentrations of LEV and CLBZ.
Methods: Blood samples from 542 patients were included in total of which 343 were male patients and 199 were female patients and were categorized as control and test. Plasma samples analyzed using an HPLC-UV method. Plasma concentrations were measured and compared to those treated and those not treated with PPIs. One way ANOVA and games Howell post hoc test used by SPSS 20 software.
Results: CLBZ concentrations were significantly 10 folds higher in patients treated with Pantoprazole (P=0.000) and 07 folds higher in patients treated with Esmoprazole and Rabeprazole (P = 0.00).Whereas plasma concentration of LEV control group has no statistically significant difference when compared to pantoprazole (P = 0.546) and with rabeprazole and esomeprazole was P= 0.999.
Conclusion: The effect of comedication with PPIs on the plasma concentration of clobazam is more pronounced for pantoprazole in greater extent when compared to esomeprazole and rabeprazole. When pantoprazole is used in combination with clobazam, dose reduction of clobazam should be considered or significance of PPIs is seen to avoid adverse effects.
Levetiracetam, Clobazam, Proton Pump Inhibitors, Drug interactions, CYP2C19, CYP3A4
Department of Pharmacy Practice, Chaitanya College of Pharmacy Education & Research, Warangal, Telangana, Department of Pharmaceutical Analysis, Chaitanya College of Pharmacy Education & Research, Warangal, Telangana, Department of Pharmacy Practice, Chaitanya College of Pharmacy Education & Research, Warangal, Telangana, Department of Pharmaceutical Analysis, Chaitanya College of Pharmacy Education & Research, Warangal, Telangana, Neurophysician, Sri Sri Neuro Centre, Warangal, Telangana