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Research Paper Open Access
Tablets of mutual prodrugs of ibuprofen, i.e, 'ibuprofen with paracetamol' and 'ibuprofen with salicylamide,' were prepared by direct compression method. The preformulation studies such as flow property, solid state stability at elevated temperatures, solid state stability under different humidity conditions, photolytic stability and compatibility studies of prodrugs with excipients were also performed to design and develop tablet formulations of prodrugs. Quality control tests and in vivo studies of prepared tablets of prodrugs were performed. The result of preformulation studies revealed that prodrugs have good flow property, good solid state stability at elevated temperatures and unstable under different humidity conditions. The photolytic stability study showed that prodrugs are quite stable to light; hence prodrugs are nonphotolytic. The compatibility study indicated that there was no incompatibility or interaction between prodrugs and excipients, which were tried. The prepared tablets of prodrugs were found to satisfy all quality control requirements of tablets mentioned in the Indian Pharmacopoeia. In vivo study of tablet formulations of prodrugs confirmed that they possessed the ability of parent drug, i.e., ibuprofen. In vivo study also showed better extent of bioavailability (indicated by AUC0-24) of tablet of prodrugs as compared to tablets of ibuprofen.