Hi there,   My sympathies to your friend. Sounds as though he's had a rough go. Treatment options are always best discussed with the doctor, but I'll try to provide some info that may help. First off, the best preparation for an asthma attack is having an Asthma Action Plan. An action plan provides clues to detecting asthma attacks before they get severe and then also guides the asthmatic in how to react to stop them in their tracks.   Oxygen is sometimes used in the emergency room at a hospital to help someone in a severe asthma attack get the oxygen they need. But it won't resolve the asthma attack. That must be done with a bronchodilator medicine (the rescue or quick-relief inhaler is used at home; IV meds might be given in the hospital, if needed) that relaxes the airways. A steroid might also be needed to address the inflammatory process.   So my answer is that having oxygen in the home is probably not the answer for your friend. He'd still need to use his inhaler. Panicking may be adding to his problems when he has an attack at home alone. So learning how to deal with such panic might be useful. A counselor or asthma educator may be able to help with that.   Good luck! Kathi