Role of Capsaicin Cream in Managing Osteoarthritis Pain

Mechanism of Action and Efficacy

Capsaicin, derived from chili peppers, works by depleting substance P, a neuropeptide involved in pain pathogenesis and intensity, with evidence supporting at least a moderate effect in reducing moderate knee pain associated with OA, according to the Mayo Clinic Proceedings 1, 2
When applied, capsaicin initially causes pain and burning as it triggers substance P release, but continued use leads to substance P depletion and pain reduction, as reported by the Mayo Clinic Proceedings 1
May require continuous use for 2-4 weeks before experiencing therapeutic effects, as stated in the Mayo Clinic Proceedings 1

The American College of Rheumatology/Arthritis Foundation conditionally recommends capsaicin for knee OA, with evidence from systematic reviews supporting its use for moderate knee pain, according to Arthritis care & research and Arthritis and Rheumatology 1, 3, 4

The American College of Rheumatology/Arthritis Foundation conditionally recommends against the use of capsaicin in hand OA, due to concerns including lack of direct evidence and potential risk of eye contamination, as reported by Arthritis care & research and Arthritis and Rheumatology 3, 4
However, the EULAR guidelines suggest topical capsaicin is effective for hand OA, with a number needed to treat of 3, according to Annals of the Rheumatic Diseases 5, 6

The American College of Rheumatology/Arthritis Foundation does not recommend capsaicin for hip OA, due to the depth of the joint beneath the skin surface, as stated in Mayo Clinic Proceedings and Arthritis care & research 1, 3

Local treatments like capsaicin are preferred over systemic treatments for mild to moderate pain when only a few joints are affected, according to Annals of the Rheumatic Diseases and BMJ 5, 6, 7
Consider capsaicin after core treatments have been implemented, as recommended by Mayo Clinic Proceedings and BMJ 1, 7
For comprehensive pain management, capsaicin may be used as part of a multimodal approach, including non-pharmacological interventions, as suggested by Mayo Clinic Proceedings and BMJ 1, 7

Most appropriate for patients with mild to moderate OA pain, according to Mayo Clinic Proceedings 1, 2
May be particularly useful for patients who cannot tolerate oral NSAIDs or have contraindications to their use, as reported by BMJ 7
Should be considered as part of a comprehensive treatment plan that includes non-pharmacological approaches, according to Mayo Clinic Proceedings 1

NICE guidelines explicitly recommend topical capsaicin as an adjunct pharmacological treatment for osteoarthritis, positioning it in the second tier of treatments after core interventions and alongside topical NSAIDs 8, 9
Lidocaine is not mentioned in any major osteoarthritis treatment guidelines (NICE, ACR, EULAR) as a recommended therapy 8, 9, 10

After implementing core treatments, such as exercise, weight loss, and patient education, consider using capsaicin as an adjunct treatment 8, 9
Lidocaine can serve as a pre-treatment to improve capsaicin tolerability in neuropathic pain protocols 11

Do not use lidocaine as monotherapy for OA pain, as there is no evidence to support this approach and it would be an off-label treatment without guideline backing 8, 9
Do not skip core treatments, as capsaicin is an adjunct, not a replacement for exercise, weight management, and education 8, 9