<s>[INST] i recently started taking 150mg nuvigil and now it seems hard to take a deep breath sometimes.  i have stopped taking it the last week or so but still am experiencing some difficulty taking a deep breath everytime i try. i am also on citalopram 10mg for anxiety [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Honestly speaking, there is no correlation between nu vigil intake and hard to take deep breath. Since you are having anxiety, sometimes uncontrolled stress and anxiety can also cause similar symptoms. Only Chat Doctor.  So better to consult psychiatrist and get done counselling sessions. Try to identify stressor in your life and start working on its solution. Counselling plays very important role along with  </s>