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Evaluation of wound healing activity of topical phenytoin in an excision wound model in rats

Sarita Mulkalwar, Lopamudra Behera, Pravin Golande, Rahul Manjare, Harshal Patil.

Abstract
Background: Wound healing is a significant healthcare problem in today’s medical practice. Despite extensive treatment modalities that are supposed to hasten the wound healing process, the outcomes of existing methods are far from optimal. One such agent that has been tried previously and found controversial in wound healing is phenytoin. Therefore, this study was planned to evaluate and compare wound healing effect of topical phenytoin with povidone iodine ointment in rats.
Methods: This study was conducted after approval from Institutional Animal Ethics Committee (IAEC). Wound healing activity of topical phenytoin (1 g% and 2 g%) was assessed in excision wound model in Sprague Dawley rats (n=8), which was compared with topical petroleum jelly and povidone iodine ointment. Parameters studied included wound area on day 0, 4, 8, 12, 16, 20, percentage wound contraction, percentage wound healing from day 0 to day 20 and period of re-epithelisation.
Results: Wound surface area decreased in all treatment groups from day 0 through day 20 and the percentage wound closure was better in both the preparations (1% and 2%) of phenytoin when compared wih control and povidone iodine, but this was not statistically significant. Furthermore, the days required for complete re-epithelisation were less with phenytoin treated groups. There was no statistical difference between both the preparations of phenytoin.
Conclusion: In this study, it was found that topical phenytoin accelerates wound healing process in an excision wound model.

Key words: Epithelization, Phenytoin, Wound contraction



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