Rhea claims Sushant took Modafinil for claustrophobia", but what is it and what are its uses?

Rhea Chakraborty said that Sushant was taking a drug called Modafinil to overcome his claustrophobia of taking flights, which he took before the flight. Rhea also said that Sushant had told her that he had a depressive episode in 2013, and he was prescribed Modafinil by Dr Shetty at that time for his depression and anxiety. NYOOOZ TV got in touch with Dr Deepak Raheja, who is a Senior Psychiatrist; Director of Hope Care India. He claims that he doesn't agree with Rhea on this as Modafinil is given to people suffering from narcolepsy.