The present invention addresses the problem of providing an excellent anti-inflammatory analgesic preparation for external use for treating inflammations (e.g., myositis, arthritis, neuritis, tendinitis, tenosynovitis, ligamentitis, bruise, sprain, etc.) in animals, in particular, for treating equine bowed tendon. Provided is a medicinal composition for external use for preventing or treating inflammations in animals, said medicinal composition for external use comprising loxoprofen or a salt thereof as an active ingredient.