Chairperson, Graduate Committee: Isaac SwensenBaan, Joseph Bradford2022-04-222022-04-222021https://scholarworks.montana.edu/handle/1/16344In this paper I estimate the additional effects counties with active Prescription Drug Monitoring Programs and Medical Marijuana Laws felt after the 2010 OxyContin reformulation compared to counties without these laws. I also estimate the effect of each additional Substance Abuse Treatment facility as well after the reformulation. I find that counties with PDMPs and MMLs see the morphine equivalent of a 6.557 and 4.681 grams decrease in the Oxycodone shipped to pharmacies for every 1000 people. Each additional SAT is associated with a 0.11 Morphine Grams Equivalent decrease. For reference 6.557 represents about 3% of the county average of MGE in Oxycodone.enDrugsLawOxycodoneMarijuanaDrug interactionsPharmacologyThesisCopyright 2021 by Joseph Bradford Baan