Be very aware of fake 'gods'
what makes you think that a psychologist* or a psychiatrist* knows anything especially the latter??? All they will probably do is to chemically dope her up to change her mood - if a chemical high is what she wants, there are a whole lot drastically cheaper ways of doing that. Or even a way to do that that costs nothing - just come over to my place and I'll explain to her all about that (only half joking here, a sexually satisfied person is a much more emotionally healthy happy person. Of course if she is the puritan type, no mind games or chemical games will cure the underlying innate physical & emotional needs).
If there are real other underlying emotional problems, better to put in some serious work and change the underlying person to something better/different. No, don't even try religion, join cults like buddists or catholics. Get back to the inner self - ala have you ever seen too many children on a playground who is not happy?
Good luck to your friend. She is lucky to have somebody care enough about her to try to find solutions for her.
*Psychiatrists study the emotional bottoms of the society, the deviant. What makes you think they know anything about how to make people normal?? Psychologists make go to the 'norm', which is very low, in my books. What makes you think they know anything about the emotional top 5%?