African Journal of
Pharmacy and Pharmacology

  • Abbreviation: Afr. J. Pharm. Pharmacol.
  • Language: English
  • ISSN: 1996-0816
  • DOI: 10.5897/AJPP
  • Start Year: 2007
  • Published Articles: 2148

Full Length Research Paper

Validated high performance liquid chromatography (HPLC) method for the determination of sumatriptan in rabbit plasma: Application to pharmacokinetic study

Ravi Sheshala1,2, Nurzalina Khan1 and Yusrida Darwis1*
1School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia. 2School of Pharmacy and Health Sciences, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia.
Email: [email protected]

  •  Accepted: 08 September 2011
  •  Published: 15 January 2012

Abstract

A new, sensitive and specific isocratic reverse phase-high performance liquid chromatography (RP-HPLC) method with fluorescence detection was developed and validated for the determination of sumatriptan in rabbit plasma using sulpiride as an internal standard (IS). Sumatriptan was extracted from plasma by a liquid-liquid extraction with a mixture of tert-butyl methyl ether, dichloromethane and ethyl acetate (2:2:3, v/v). Chromatographic separation of the analyte and internal standard was achieved on a Phenomenex C4 (250 × 4.6 mm, 5 µm) analytical column maintained at 40°C. The mobile phase was composed of 25 mM ammonium acetate (pH 6.5) and acetonitrile (85:15, v/v), pumped isocratically at a flow rate of 0.9 ml/min. Column eluent was monitored at excitation and emission wavelengths of 225 and 350 nm. The calibration curve was linear over a concentration range of 1 to 300 ng/ml (r2 = 0.9999) with a limit of quantification, 1 ng/ml. The intra-day and inter-day precision and accuracy were between 2.24 and 4.28% and -1.10 and 2.86%, respectively. The mean recoveries of sumatriptan and sulpiride were 89.92 and 91.03%, respectively. Sumatriptan containing plasma samples were stable at -20°C for 14 days. The validated method was successfully applied for pharmacokinetic study after a single oral administration of sumatriptan (50 mg) to rabbits.

 

Key words: Sumatriptan, rabbit plasma, reverse phase-high performance liquid chromatography (RP-HPLC), liquid-liquid extraction, pharmacokinetics.

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