Inclusion Criteria:  Completers of the lead-in Study 3110-305-002 (in the main study or PK cohort) or those who screen failed due to being placebo responders. Demonstrated an acceptable degree of compliance with study procedures in the lead-in study and who, in the investigator's clinical judgment, did not experience an AE that may indicate an unacceptable safety risk for this study.  Exclusion Criteria:  Requirement for any medication (eg, barbiturates) or diet (eg, grapefruit juice) that is on the list of prohibited concomitant medications that cannot be discontinued or switched to an allowable, alternative medication at Visit 1. An ECG with clinically significant abnormalities at Visit 1 as determined by the investigator. Clinically significant abnormalities in physical examination at Visit 1, as determined by the investigator. Significant risk of self-harm, based on clinical interview and responses on the C-SSRS, or of harm to others in the opinion of the investigator; participants must be excluded if they report suicidal ideation with intent, with or without a plan (ie, Type 4 or 5 on the C-SSRS), or report suicidal behavior at Visit 1 Any medical or other reason (eg, unlikely to adhere to the study procedures, keep appointments, or is planning to relocate during the study) that, in the investigator's opinion, might indicate that the participant is unsuitable for the study.