Modafinil is primarily prescribed for sleep disorders such as narcolepsy, sleep apnea, and shift work sleep disorders. It has a stimulating effect on the central nervous system that enhances alertness and cognitive function. Modafinil’s impact on anxiety can vary. Some users report increased anxiety or nervousness due to its stimulating properties, and others find that Modafinil's focus-enhancing effects help manage stress more effectively. Individual responses to the medications differ, so it is important to monitor how Modafinil affects your anxiety levels. Consult a healthcare provider for appropriate dosage and mitigate any potential side effects.