Evergreening of Psychiatric Medications: A Systemic Literature Review of Strategies, Case Examples, and the Implications of Cost

Abstract

Evergreening consists of multiple ways that pharmaceutical companies extend patent protection and prolong profitability of brand name drugs past patent expiration. In psychotropic medications, these strategies do not necessarily make more effective drugs, and often increase drug prices, which can result in lower access and utilization. There has not been a systematic literature review of evergreening strategies for psychiatric medications. Based on such a review, 11 strategies were identified and relevant examples were provided. Four case examples of commonly used psychiatric medications indicated evergreen prices 3 to 211 times the cost of the original medication, and the evergreen costs ranging from $132.00 to $10,125.24 higher than the original cost on an annual basis. The higher cost of evergreening medications can create inefficiencies and waste in healthcare resulting in lower-quality patient care. Healthcare providers, patient advocates, health insurance companies, and policy-makers should be aware of these practices to improve healthcare systems.

Keywords: Evergreening; Healthcare Costs; Prescription Drug Costs; Psychiatric Medications; Systematic Review.