Enhanced NSAIDs Solubility in Drug-Drug Formulations with Ciprofloxacin

Drug-drug salts are a kind of pharmaceutical multicomponent solid in which the two co-existing components are active pharmaceutical ingredients (APIs) in their ionized forms. This novel approach has attracted great interest in the pharmaceutical industry since it not only allows concomitant formulations but also has proved potential to improve the pharmacokinetics of the involved APIs. This is especially interesting for those APIs that have relevant dose-dependent secondary effects, such as non-steroidal anti-inflammatory drugs (NSAIDs). In this work, six multidrug salts involving six different NSAIDs and the antibiotic ciprofloxacin are reported. The novel solids were synthesized using mechanochemical methods and comprehensively characterized in the solid state. Moreover, solubility and stability studies, as well as bacterial inhibition assays, were performed. Our results suggest that our drug-drug formulations enhanced the solubility of NSAIDs without affecting the antibiotic efficacy.

Automated summary

Drug-drug salts are a new type of pharmaceutical multicomponent solid that contains active pharmaceutical ingredients (APIs) in ionized forms. They have garnered interest in the pharmaceutical industry for their ability to coexist and improve the pharmacokinetics of the APIs, particularly those with dose-dependent secondary effects like NSAIDs. In this study, six multidrug salts consisting of different NSAIDs and the antibiotic ciprofloxacin were synthesized and characterized. Solubility, stability, and bacterial inhibition assays were performed, showing enhanced solubility of NSAIDs without affecting antibiotic efficacy.