Effects of a new foam formulation of ketoprofen lysine salt in experimental models of inflammation and hyperalgesia.
1995
The anti-inflammatory and analgesic profile of a new topical foam formulation of ketoprofen lysine salt (CAS 57469-78-0, Artrosilene® Schiuma, KLS-foam) was characterized in comparison with marketed gel formulations containing KLS (KLS-gel) or diclofenac diethylammonium salt (DCF-gel). KLS-foam dose-dependently inhibited oedema formation and hyperalgesia induced by subplantar injection of carrageenan or substance P being more potent than KLS-gel. At equieffective anti-inflammatory doses, KLS-foam provided a more pronounced analysis effect than DCF-gel. KLS-foam also markedly inhibited exudate formation and prostaglandin production induced by subcutaneous implantation of carrageenan soaked sponges. In carrageenan induced paw inflammation, KLS-foam provided the same anti-inflammatory effect as orally administered KLS, but induced significantly less gastric damages. Oral administration of KLS resulted in sustained systemic absorption of ketoprofen, whereas after topical application of KLS-foam no appreciable ketoprofen plasma levels were detected. These data support the anti-inflammatory and particularly the analgesic effectiveness of the new foam formulation of KLS, a finding that, together with the high gastric tolerability, further emphasizes the usefulness of KLS-foam in the treatment of localized flogistic diseases and associated pain
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