I suffer from anxiety as well and maybe your friend might benefit from what has been helping me when my anxiety starts to take hold I open my bible and just begin to read if I'm unable to read the passage that I have opened to I close my eyes and pray that God will give me something to calm my spirit and help me to be at ease with my eyes still closed I will flip open to a random page in my Bible and then open my eyes and begin to read . God is so good he always gives me a passage that brings me back to a calm peaceful state. Sometimes I will read two to three chapters before I feel fully at peace but the lord always gives me something in those verses I pray for you and your friend and I pray that God will help him to find the peace that he is seeking