Evaluate SAGE-547 in Participants With Essential Tremor

A Double-blind, Placebo-controlled, Two-Period Crossover Proof-of-Concept Study Evaluating the Safety, Tolerability, Pharmacokinetics, and Efficacy of SAGE-547 Injection in the Treatment of Patients With Essential Tremor

Stage 1 is a double-blind, proof-of-concept study designed to evaluate the safety, tolerability, pharmacokinetics (PK), and efficacy of SAGE-547 Injection in male and female participants with essential tremor in the upper limb.

Stage 2 is an open-label arm designed to evaluate the safety, tolerability, PK, and effectiveness of SAGE-547 Injection at a higher dose than in Stage 1. Participants who completed Stage 1 were invited to participate in Stage 2.

Inclusion Criteria:

• Males and females, 35-75 years old with a diagnosis of essential tremor with symptoms clearly present in at least 1 upper limb; participant has had tremor present for at least 2 years prior to Screening
• Off medication, or on a stable dose of medication for their tremor for at least 28 days prior to Screening

Exclusion Criteria:

• Recent history or active clinically significant manifestations of metabolic, hepatic, renal, hematological, pulmonary, cardiovascular, gastrointestinal, musculoskeletal, dermatological, urogenital, eyes, ears, nose, or throat, psychiatric, or neurological (other than essential tremor) disorders
• Medical history of seizures