Levodopa-induced dyskinesia (LID) is a complication stemming from the long-term use of levodopa to treat Parkinson’s disease (PD); it causes abnormal involuntary movements. Surveyed neurologists in the United States estimate that nearly 30% of their PD patients currently experience motor complications and LID, both of which can be disabling and painful and greatly affect patients’ quality of life and activities of daily living. Currently, only a few options are available to treat PD–LID, including amantadine IR, a long-standing generic drug that is not specifically approved for LID and has an unfavorable side-effect profile. In the United States, Supernus’s Gocovri (amantadine ER) is the only FDA-approved treatment for PD–LID; third-to-market Osmolex ER (Supernus) is limited to off-label use. Nevertheless, the treatment of PD–LID is evolving; new research suggests that Supernus’s Xadago has antiglutamatergic properties that may positively impact LID. In addition, the early- and late-phase pipeline is rich with new agents (e.g., dipraglurant [Addex], mesdopetam [IRLAB]). Understanding prescriber perceptions of the available options for PD–LID and the drivers behind prescribers’ clinical decision-making for the indication can help drug developers identify levers for new product positioning and differentiation.
QUESTIONS ANSWERED
PRODUCT DESCRIPTION
Provides quantitative insight into U.S. and European physician perceptions of key treatment drivers and goals and the current level of unmet need for a specific disease. Commercial opportunities are analyzed, and the extent to which emerging therapies may capitalize on these opportunities is evaluated.
Markets covered: United States, United Kingdom, France, Germany
Primary research: Survey of 61 U.S. and 31 European neurologists fielded in January 2023
Key companies: Supernus
Key drugs: amantadine IR, Xadago, Gocovri, Osmolex ER