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KMID : 1170320230290020109
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Korean Journal of Health Economics and Policy
2023 Volume.29 No. 2 p.109 ~ p.140
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Effects of unmet medical needs satisfaction by new drug entry on pharmaceutical expenditures
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Hwang So-Jung
Lee Tae-Jin
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Abstract
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The aim of this study is to investigate the impact of the medical unmet needs satisfaction on pharmaceutical expenditures by their type; first satisfaction, satisfaction for treatment failure; satisfaction for selective patients. We analyze the impact of unmet medical needs satisfaction by new drug entry on drug expenditures, treatment substitution and expansion effect considering the differentiation degree of drug classes and patients' group for public concern diseases, rare and intractable diseases, and diseases with new drug entry between 2008 and 2021. And growth of drug expenditures is decomposed into 3 parts; cost, patients' number, drug mix. The result indicates that first satisfaction causes cost to increase by 88.0%, patients' number to increase by 8.0%, drug mix to decrease by 57.0% and overall drug expenditures to increase by 39.0%, (+)31.0% substitution effect, (+)8.0% expansion effect. Satisfaction for treatment failure neither gives rise to significant expansion effects nor causes significant change in drug expenditures, substitution effect due to cost increase being offset by the decrease of drug mix. Satisfaction for selective patients causes drug expenditures to increase by 9.5%, (+)5.4% substitution effect and the significance of increase in cost, patients' number and decrease in drug mix is lost when considering differentiation of drugs' classes. Classes differentiation itself results in 76.9% increase in cost and 81.3% decrease in drug mix. The finding of this study implies the degree of increase in drug expenditures, substitution and expansion effect of the first satisfaction is the largest. And it suggests the impact on the decomposed part of pharmaceutical expenditures and the increase in drug expenditures due to the substitution and expansion effect can be mitigated through active differentiation of drug classes in relation to first satisfaction and satisfaction for selective patients.
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KEYWORD
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unmet medical needs satisfaction, drug expenditures, substitution effect, expansion effect, drug classes differentiation
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