Face The Reaper

Oblivion is the place of nothingness within the Omniverse and to gaze upon it for too long with a weak or unenlightened mind can rend the psyches of lesser beings. A member of the Squad has done just that and now they are hallucinating, becoming increasingly irritable and hostile, and they keep stuttering or important things slip their minds. 
What can his Squadmates do for him? How do you heal the mind of a friend? 
(For starters, you could use a Philosopher or some such to allow the others to enter the afflicted Adept's mind and together they can face the powers of Oblivion).