Loxoprofen: A Review in Pain and Inflammation

Area of Science:

• Pharmacology
• Pain Management
• Drug Delivery Systems

Background:

• Loxoprofen is a prodrug-type NSAID available in oral (tablets) and topical (hydrogel patches, tape) formulations.
• Various pain conditions are treated with loxoprofen, including postoperative pain, knee osteoarthritis, lumbar pain, myalgia, and trauma-induced swelling.

Purpose of the Study:

• To evaluate the analgesic efficacy and safety of loxoprofen compared to active comparators.
• To assess the noninferiority of loxoprofen hydrogel patches to oral loxoprofen and other topical NSAIDs.

Main Methods:

• Active comparator-controlled trials for oral loxoprofen efficacy against celecoxib, ibuprofen, and naproxen.
• Double-blind, double-dummy, and open-label trials comparing loxoprofen hydrogel patches with oral loxoprofen and other topical NSAIDs (ketoprofen, indometacin).

Main Results:

• Oral loxoprofen demonstrated comparable analgesic efficacy to celecoxib, ibuprofen, and naproxen for various pain types.
• Loxoprofen hydrogel patches were noninferior to oral loxoprofen and other topical NSAIDs in improving symptoms of knee osteoarthritis, myalgia, and trauma-induced pain.
• Both oral and topical loxoprofen exhibited good tolerability in clinical trials.

Conclusions:

• Loxoprofen is an effective analgesic for pain and inflammation across multiple formulations.
• Topical loxoprofen presents a potentially safer alternative, possibly mitigating gastrointestinal, cardiovascular, and renal risks associated with oral NSAIDs.