Hi guys! I've read through some of the posts but I'm having a hard time understanding where we should start. Some background.... my boyfriend gets really bad cluster headaches. Today he got three, one of them lasting 2+ hours. It seems to me he usually gets them during season changes. Regardless, I want to start getting him some treatment to see if anything works. Where do we start? Do I get him to ask his doctor to prescribe oxygen? Should he go straight to medicine? If so, which ones? I can't tell which medicines are the most effective and have the highest likelihood of helping him. Thank you for your support and help and let me know if you need any additional information.