DEERFIELD, Ill. — A new Walgreens study examining the impact of 90-day medication refills at community pharmacies compared to 30-day refills for Medicaid patients found that across four therapeutic categories, patients with 90-day refills had greater medication adherence and greater persistency, nominal wastage and more cost savings. The study, titled "Medication Days’ Supply, Adherence, Wastage and Cost Among Chronic Patients in Medicaid," was published in Medicare & Medicaid Research Review and released Wednesday.