How do you cure panic anxiety from a person who suffers with schizophrenia?

i would describe the 'anxiety' as for 3 to somtimes 5 hours for 3 days every weekend, being attacked by thinking about the future leads to panic attacks, where one doesnt want to talk to people or anyone. ways to deal with have been affirmation exercises, breathing exercises . any other suggestions? also does anyone know of any hypnotherepy or NLP any other treatment similar that could help? as it could be a subconscious thing to do with fear, although I have read that NLP etc should not be used in this way. Person concerned also has OT visiting one hour a week and is staying in a rehab where encouragement for outings and independent living is provided. thanks.