<qa>  What is the Epworth Sleepiness Scale completed at each visit?4. Safety and tolerability assessment: During the course of each titration phase, patients will be assessed in the clinic at 2-week intervals, or sooner if indicated. A general physical examination including blood pressure, pulse, and weight as well as detailed questioning regarding possible adverse events and tolerability will be completed. The Epworth Sleepiness Scale will be completed at each visit. Telephone contact will be made on alternate weeks to assess for the occurrence of adverse events and to discuss titration schedules. Patients will be able to reach a physician at all times via pager in the event of difficulties encountered between scheduled contact times. 