Your study doctor or staff will explain the amount of medication you will receive, and will give you instructions on how to take it. It is important that your study drug is not taken by anyone else. Your study doctor and other study staff, whom you are to ask any questions about the study drug's effects and any side effects, will regularly check your response to treatment. If you get worse, the study drug dose may be changed, or you may be given additional medications, or the study drug may be stopped and you will be given another drug instead.