Planta Med 2012; 78(16): 1761-1766
DOI: 10.1055/s-0032-1315262
Original Papers
Georg Thieme Verlag KG Stuttgart · New York

Dermal Pharmacokinetics of Terpinen-4-ol Following Topical Administration of Zingiber cassumunar (plai) Oil

Kotchaphan Chooluck
1   Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand
,
Rajendra P. Singh
2   Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL, USA
,
Korbtham Sathirakul
1   Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand
,
Hartmut Derendorf
2   Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL, USA
› Author Affiliations
Further Information

Publication History

received 15 May 2012
revised 28 June 2012

accepted 24 July 2012

Publication Date:
01 October 2012 (online)

Abstract

The purpose of this study was to investigate dermal pharmacokinetics of terpinen-4-ol in rats following topical administration of plai oil derived from the rhizomes of Zingiber cassumunar Roxb. Unbound terpinen-4-ol concentrations in dermal tissue were measured by microdialysis. The dermal pharmacokinetic study of terpinen-4-ol was performed under non-occlusive conditions. The oil was topically applied at a dose of 2, 4, and 8 mg/cm2 plai oil corresponding to the amount of 1.0, 1.9, and 3.8 mg/cm2 terpinen-4-ol, respectively. Following topical application of the oil, terpinen-4-ol rapidly distributed into the dermis and demonstrated linear pharmacokinetics with no changes in the dose-normalized area under the concentration-time curves across the investigated dosage range. The mean percentages of free terpinen-4-ol distributed in the dermis per amount of administered were 0.39 ± 0.06 %, 0.41 ± 0.08 %, and 0.30 ± 0.03 % for 2, 4, and 8 mg/cm2 doses, respectively. The dermal pharmacokinetics of terpinen-4-ol could provide information for its further formulation development and therapy schedules.

Supporting Information

 
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