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Pharmacodynamic and\ndose-response modeling is supported through Emax-based models,\nincluding stimulatory (sigmoid Emax) and inhibitory (sigmoid\nImax) Hill models, four- and five-parameter logistic models, as\nwell as median toxic dose (TD50) and lethal dose (LD50) models.\nThe package is intended to support parameter estimation,\nsimulation, and model comparison in pharmaceutical research,\ndrug development, and pharmacometrics education. 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