My Son Is 25. He Got A Prescription For Strattera

My son is 25. He got a prescription for Strattera a couple months ago. A couple weeks after he started taking it, he started having severe anxiety and depression issues and OCD episodes. He went back to Doctor and started weening off of it. That was 3 weeks ago. She then gave him a prescription for Paxil. He has taken both of these medicines in the past and seemed to do well. He threw away the paxil after 2 doses.
He is now having anxiety worse than ever and I feel very helpless for him. He is a very stubborn and feels that he doesn't need anything, that God will heal his mind. He will not seek any counseling either. His father takes something like valium, and has given him a couple just to cope until all of the side effects go away. He doesn't want to take the Paxil because of the lack of sexual desire. Is there any other pill that doesn't cause sexual disfunction. Thanks. Sorry I am rattling on and on. I just feel so bad for my son, and there seems to be nothing I can do.