Oral versus topical NSAIDs in rheumatic diseases: a comparison.

Area of Science:

• Pharmacology
• Rheumatology
• Drug Delivery Systems

Background:

• Nonsteroidal anti-inflammatory drugs (NSAIDs) are widely used but associated with significant adverse drug reactions, particularly gastrointestinal (GI) complications.
• Patients with rheumatic diseases are at higher risk for these GI complications when using oral NSAIDs.

Purpose of the Study:

• To evaluate the efficacy and safety profile of topically administered NSAIDs compared to oral formulations for rheumatic diseases.
• To explore the pharmacokinetic properties, including absorption and tissue distribution, of topical NSAIDs.

Main Methods:

• Systematic review and analysis of clinical studies investigating topical NSAID use in rheumatic conditions.
• Pharmacokinetic assessments of NSAID penetration into dermal, muscle, and synovial tissues after topical application.
• Comparison of adverse event profiles between topical and oral NSAID administration.

Main Results:

• Topical NSAIDs demonstrate significantly reduced systemic adverse effects, especially GI complications, compared to oral NSAIDs.
• Percutaneous absorption of topical NSAIDs is variable, influenced by product formulation and individual skin properties.
• While topical NSAIDs reach synovial fluid, the exact mechanism and extent require further investigation.
• Adverse effects are primarily cutaneous (10-15%), with rare GI events, contrasting with the 15% GI incidence of oral NSAIDs.

Conclusions:

• Topical NSAIDs present a superior safety profile for managing rheumatic diseases, with a lower incidence of serious adverse events.
• Clinical evidence suggests comparable efficacy to oral NSAIDs, though further studies are needed for definitive documentation.
• Variability in absorption and response necessitates personalized treatment approaches and optimized product formulations for topical NSAIDs.