Abstract
Drug taste, which affects palatability, influences drug adherence. Sensory masking may be used to confound bitter tastes in drugs with other tastes and flavors; however, evaluation of sensory masking is difficult because of the existence of multiple tastes. In this study, a new two-bottle choice test was performed in rats to evaluate bitterness masking and determine the drug-to-sweetener ratio that significantly improves palatability. Sulfamethoxazole and trimethoprim were used as model bitter drugs, and sucralose was used as sweetener. The addition of sucralose and trimethoprim at a 0.13 : 1 ratio resulted in the greatest improvement in preference. This method is a useful new technique for evaluating the palatability of drug formulations.
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