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Original Article

pnr. 2014; 5(1): 15-18


No impact of neuropathy on pharmacokinetic of lamotrigine in rat model

Prameela Rani Avula, Hema Veesam.


Abstract

Purpose: The aim of the present research is to monitor any alteration in the serum concentrations of lamotrigine (LMT) in peripheral neuropathic conditions compared with normal conditions in a rat model. Materials and Methods: LMT concentrations were established at 0.25, 0.5, 1, 2, 4, 6, 8, 10, 12 and 24 h post dose by high performance liquid chromatography-ultraviolet. After per oral administration of 10 mg/kg drug, pharmacokinetic parameters were determined from plasma drug concentration. Later pharmacokinetic parameters of neuropathic pain induced rats were calculated in order to estimate the possible effect of neuropathic pain on pharmacokinetic parameters. Results: The regression coefficient determined for LMT calibration curve was 0.99 ± 0.001. The working range for LMT was 0.5 to 2.5 μg/ml Limit of Detection (LOD 0.2 μg/ml). The maximum drug concentration was found at 2 h. Conclusion: However, none of the pharmacokinetic parameter showed statistically significant alteration where the results were quite stimulating for the development of clinically useful oxcarbazepine dosage form to explore its activity on neuropathic pain.

Key words: Chronic constriction injury, lamotrigine, neuropathic pain, pharmacokinetics parameters






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