Efficacy and Safety Study of Inhaled CVT 301 in Parkinson's Disease Patients for Treatment of OFF Episodes

Inclusion Criteria:

- Idiopathic Parkinson's Disease (PD) diagnosed between the ages of 30 and 80 years;

- Hoehn and Yahr Stage 1-3 in an "on" state;

- Require levodopa-containing medication regimen at least 4 times during the waking day;

- Experience motor fluctuations with a minimum of 2 hours of average daily "off" time
per waking day (excluding early morning "off" time) and demonstrate levodopa
responsiveness;

- Are on stable PD medication regimen.

Exclusion Criteria:

- Pregnant or lactating females;

- Previous surgery for PD or plan to have stereotactic surgery during the study period;

- History of psychotic symptoms requiring treatment, or suicide ideation or attempt
within last year;

- Adequate lung function as measured by spirometry;

- Any significant condition, severe concurrent disease, abnormality or finding that
would make patients unsuitable or may compromise patient safety.