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ABSTRACT
Formulation of acetaminophen syrup could be developed by an optimization technique to reduce the time and cost of study. Cosolvents were used in the formulation because of the low solubility of acetaminophen in water. They were composed of polyethylene glycol 4000, propylene glycol, sorbitol solution, and glycerin. Their effects on the solubility of acetaminophen and the pH of formulations were investigated. Effects on taste and price were calculated based on their properties. Simulation study of the effect of cosolvents upon the formulation scores was performed, using an algorithm based upon a simulated annealing concept to achieve the global optima and heuristic optimization concept to accelerate convergence. The program written as a Visual Basic module within Microsoft Access 97 was used to simulate and assess the optimal cosolvent amounts to achieve the most desirable formulations automatically according to the specified criteria. Formulators could customize the optimal formulation according to their needs and cost constraints by redefining the desirable outcomes in the source code of the program.