What is the recommended treatment with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) for a patient with lateral epicondylitis (tennis elbow)?

NSAIDs for Tennis Elbow (Lateral Epicondylitis)

Topical NSAIDs are the preferred NSAID formulation for tennis elbow, providing short-term pain relief (up to 4 weeks) with minimal adverse effects, while oral NSAIDs offer conflicting evidence of benefit and carry significant gastrointestinal risks. 1, 2, 3

Topical NSAIDs: First-Line NSAID Choice

Topical NSAIDs (such as diclofenac gel) should be applied twice daily for acute pain relief, as they eliminate the risk of gastrointestinal hemorrhage associated with systemic NSAIDs. 1

Evidence for Topical NSAIDs

• Topical NSAIDs demonstrate significantly greater pain reduction compared to placebo (mean difference -1.64 on a 0-10 scale), with a number needed to treat of 7 3
• 49% more participants report fair, good, or excellent effectiveness with topical NSAIDs versus placebo at 28 days 3
• Adverse effects are minimal, with mild transient skin rash occurring in approximately 2.5% of users 3
• The benefit is primarily short-term (up to 4 weeks) and does not alter long-term outcomes 1, 3

Oral NSAIDs: Limited and Conflicting Evidence

Oral NSAIDs (such as diclofenac 50 mg twice daily or naproxen) may provide short-term pain relief in the acute phase but show conflicting evidence and do not affect long-term outcomes. 1, 4, 3

Key Limitations of Oral NSAIDs

• Evidence from placebo-controlled trials is conflicting, with one trial showing benefit and another showing no difference 3
• Gastrointestinal adverse effects are significantly more common with oral NSAIDs (risk ratio 3.17) 2, 3
• Some trials show corticosteroid injection provides greater short-term benefit than oral NSAIDs 2
• No direct comparison between topical and oral NSAIDs exists in the literature 2, 3

Clinical Algorithm for NSAID Use in Tennis Elbow

Initial Treatment Phase (Weeks 0-4)

• Start with topical NSAIDs (e.g., diclofenac gel) applied twice daily to the lateral epicondyle 1, 3
• Combine with relative rest, ice therapy (10-minute periods), and eccentric strengthening exercises 1, 4
• Monitor for mild skin reactions (2.5% incidence) 3

If Inadequate Response at 2-4 Weeks

• Consider adding oral NSAIDs (e.g., naproxen or diclofenac 50 mg twice daily) for additional short-term relief, but only after assessing gastrointestinal risk factors 1, 4
• Alternatively, corticosteroid injection may be more effective than oral NSAIDs for acute phase relief, though this benefit is not sustained long-term 4, 2

Duration of NSAID Therapy

• NSAIDs are intended for short-term use (typically 3-6 weeks) during the acute inflammatory phase 1, 5
• Discontinue NSAIDs once pain and inflammation subside to allow progression to physical therapy 6, 5
• Most patients (80%) recover within 3-6 months with appropriate conservative treatment 1

Important Clinical Caveats

Gastrointestinal Risk with Oral NSAIDs

• Oral NSAIDs carry a 3-fold increased risk of gastrointestinal adverse effects compared to placebo 2
• Four participants in one trial discontinued oral NSAIDs due to gastrointestinal side effects 3
• Topical NSAIDs eliminate this systemic risk and should be strongly preferred when NSAID therapy is indicated 1

NSAIDs Do Not Alter Long-Term Outcomes

• Both topical and oral NSAIDs provide only symptomatic relief and do not change the natural history of the condition 1, 4, 3
• The primary goal of NSAID use is to reduce acute pain sufficiently to allow participation in eccentric strengthening exercises, which are the cornerstone of long-term recovery 1, 5

Comparison with Corticosteroid Injection

• Corticosteroid injections may be more effective than oral NSAIDs in the acute phase (risk ratio 3.06 for patient-perceived benefit) 2
• However, corticosteroids do not alter long-term outcomes and may inhibit healing, reduce tensile strength, and predispose to tendon rupture 1, 4
• Corticosteroids should be used with caution and reserved for cases where NSAIDs provide insufficient relief 1, 4