Immediate and mid-term effect of a natural topical product in patients with musculoskeletal pain: randomized, double-blinded, and placebo-controlled clinical trial.

Introduction: Musculoskeletal pain is a common affection due to ageing, sedentarism and injuries. The objective of this trial is to prove efficacy of a natural topical composition containing Arnica montana, Hypericum perforatum, Calendula officinalis, Melaleuca sp. and menthol in pain management in adults with acute or chronic pain. Methods: This randomized, double-blinded and placebo-controlled trial included 200 patients with musculoskeletal pain, 100 in the intervention group receiving the topical formula and 100 in the placebo group, receiving a similar formula without active ingredients. The products were applied topically twice daily for 14 days in affected areas. Immediate pain alleviation and stiffness perception were monitored for two hours at days 0, 7 at 14. Pain reduction and recovery perception upon sustained application were assessed after 7 and 14 days. Results: Intervention immediately reduced pain and stiffness at rest and in motion 30 minutes after application and kept being superior to placebo in all short-term timepoints (p < 0.05). Immediate pain reduction was maintained even at late stages of recovery. A two-week sustained intervention resulted in significant pain reduction and improvement in recovery perception. Even if both groups reached statistical significance with respect to baseline due to spontaneous lesion recovery, a significantly improved recovery was reported in the intervention group with respect to placebo. Conclusions: Intervention was found to reduce pain and stiffness upon minutes of its application and to improve pain and mobility over the 14 days of treatment, showing benefits both for immediate alleviation and for longer term recovery.