Objectives: to evaluate the effect of the 2010 legal decree (DCA) in the Lazio Region (Central Italy), promoting appropriateness on use of agents acting on the renin-angiotensin system, and limiting use of angiotensin II receptor blockers (ARBs) within this drug group to levels below 30%.
Setting and participants: two cohorts of incident patients with diagnosis of cardiovascular disease (CVD) were enrolled from the regional hospital information system: the first cohort included patients discharged during the 12 months before DCA (35,917 patients), and the second one patients discharged during the 12 months after DCA (35,491 patients).
Design: the first prescriptions of angiotensin- converting enzyme inhibitors (ACEIs) and ARBs in the 30 days after discharge were collected from the drug claims registry. The trends of monthly prescription proportions for the two drug groups were compared through a segmented regression analysis.
Main outcomes measures: comparison between the pre- and post-DCA periods, distinguishing between prescription made by hospital physicians and by general practitioners, and between naïve and prevalent users.
Results: proportion of patients with CVD treated with ACEIs/ARBs after discharge was 50% in both pre-DCA (35,917 patients) and post-DCA (35,491 patients) cohorts, with the same share of ACEIs (60%) and ARBs (40%). ARB proportions met the threshold only for hospital prescriptions. Among naïve users, the target was met for both hospital physicians and general practitioners.
Conclusions: the specific DCA has not led to an overall improvement in the appropriateness of prescribing of ACEIs/ARBs in secondary cardiovascular prevention. However, there is a suitable prescription choice for naïve patients and when the drug is dispensed in hospital pharmacies.