Adherence and persistence with fluticasone propionate/salmeterol combination therapy

BackgroundPharmacy database medication refill studies provide a panoramic view of medication-taking behavior in patients nationally.ObjectiveTo investigate fluticasone propionate/salmeterol combination (FSC) adherence, including the factors associated with refill adherence in a large national pharmacy database.MethodsAdherence and persistence were documented for 12 months from date of initial FSC prescription in 5504 patients who filled their medication at a nationwide pharmacy chain.ResultsOn average, patients filled enough medication to cover 22.2% of days. More than half the patients filled a 30-day prescription only once over the 1-year interval. Higher adherence levels were associated with being male, being older than 35 years, having a comorbid disorder, a having a copay of $1.01 to $10, previous β2-agonist use, and a prescription for higher-dose FSC.ConclusionThis pharmacy database study portrays medication adherence levels to be considerably lower than those reported in most clinical trials, suggests that most adults taking FSC obtain a single fill before abandoning their controller medication, and indicates a need for a reappraisal of current treatment guidelines and educational strategies for both providers and patients.Clinical implicationsFor many patients, filling of a controller medication is markedly discrepant with practice guidelines. Reappraisal of both the guidelines and strategies to implement them is in order.