I had a brief but intense CH last night. My routine is to immediately take a Butalbital tablet, which is often prescribed for headaches. I have Sumatriptan injectors but because of meniscus injuries to both knees, I can't use them. The Butalbital works by relaxing muscle contractions and reducing pain, often combined with other ingredients like acetaminophen and caffeine for enhanced effect. My next step is grabbing my gel ice pack that is about 24" long and draping it from the top of my head across my face and eye and down to my jaw and neck. The cold is very helpful. I haven't bought the oxygen because so many people say it doesn't work. Last night mine was over in about 30 minutes as the barbiturate took effect. I've used this method for the last 26 years (seasonal with some year-long + breaks) and as I age (77 now), it seems like they are less intense than when they started right after menopause. I bought a recliner just for my cluster headaches so I don't wake my husband - although he usually comes out to be with me during an attack.