Relieving Butane Huffing Symptoms

Please help me - my son just admitted to Butane inhalaning and pot smoking because he is scared. His symptoms are panic, disorientation,headaches and spoted vision. What can I do to relieve some of his symptoms?
i would just stay with him especially when he his coming off inhalants, the headaches and disorentation are common, I know i was a gas huffer at 13 and when i quit i was a mess hopefully your son learns from this and hopefully he stays away from inhalants because they are a wicked bunch of chemicals good luck