Use of prescription drugs in fee-for-service Medicaid was lower in states with medical marijuana laws than in states without such laws in five (pain, depression, nausea, psychosis and seizures) of the nine broad clinical areas studied, based on quarterly data in the period 2007–14.

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Use of prescription drugs in fee-for-service Medicaid was lower in states with medical marijuana laws than in states without such laws in five (pain, depression, nausea, psychosis and seizures) of the nine broad clinical areas studied, based on quarterly data in the period 2007–14.