Abstract
Combinational utilization of intravenous non-steroidal anti-inflammatory drugs (NSAIDs) with opium analgesic is an effective alternative modality for pain control after surgery. This regimen is known for reducing the risk of addiction induced by opium analgesic. However, current intravenous NSAIDs have solubility problems, limiting their clinical applications. Although loxoprofen exhibits strong anti-inflammatory and analgesic activities with relatively low ulcerogenicity, its relatively low bioavailability makes it not an ideal drug candidate for intravenous injection. We selected the bioactive metabolite (6) of loxoprofen as a candidate and developed a new intravenous NSAID, HR1405–01. This metabolite exhibited significantly stronger anti-inflammatory and analgesic activities than parecoxib sodium injection or ibuprofen injection. The excellent potency and solubility of HR1405–01 allowed the avoidance of utilization of cosolvent in the formulation, resulting in fewer side effects and a better safety profile. Therefore, HR1405–01 might be a promising candidate for the development of a new intravenous NSAID.
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