Effect of Emulgel containing Langkasuka Oil versus Diclofenac Gel for Improving Physical Function in Patients with Knee Osteoarthritis: A randomized controlled trial

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Kulkamol Vannasri
Suwanna Maenpuen
Prakairat Tunit

Abstract

Knee osteoarthritis (KOA) is characterized by a progressive decline in physical functioning. Emulgel containing Langkasuka oil (ELO) represents a newly developed formulation incorporating Langkasuka oil as an active constituent. This study aimed to evaluate the impact of ELO on lower limb function and mobility, as assessed by the Timed Up and Go (TUG) test and 30-Second Chair Stand (30-CST) test. Participants were allocated into two groups: an experimental group receiving topical ELO and a control group receiving topical diclofenac gel (DG). Both groups were instructed to apply the assigned substance to the knee area three times daily for a period of four weeks. Outcome measures were assessed at baseline, day 14, and day 28. Statistical analysis was performed using repeated measures ANOVA to assess within-group changes over time, and one-way ANOVA to examine between-group differences. In the ELO group, mean scores progressively declined from 11.29±1.42 at baseline to 8.10±0.94 at Day 28, indicating a clinically significant transition from moderate fall risk to normal functional status. A comparable reduction was observed in the DG group, with mean scores decreasing from 11.26±1.55 at baseline to 8.06±1.12 at Day 28. Both the ELO and DG groups demonstrated statistically significant improvements in 30-CST performance over the 28-day intervention period (p<0.001), with mean scores increasing from 8.61±1.05 to 10.26±1.29 and from 8.65±0.98 to 10.13±1.26, respectively. In conclusion, the newly developed ELO demonstrated effectiveness in improving physical function in the management of knee osteoarthritis, with outcomes comparable to those achieved with conventional pharmacological treatment.

Article Details

How to Cite
Vannasri, K. ., Maenpuen, S., & Tunit, P. (2026). Effect of Emulgel containing Langkasuka Oil versus Diclofenac Gel for Improving Physical Function in Patients with Knee Osteoarthritis: A randomized controlled trial. Interdisciplinary Research Review, 21(2). retrieved from https://ph02.tci-thaijo.org/index.php/jtir/article/view/265218
Section
Research Articles

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