hello my name is craig I have suffered episodic clusters for 30 years. I was a smoker drinker who finally did my own research on clusters and learned drinking and smoking Tabaco greatly added to the severity of my headaches. here in Oregon medical marijuana became legal, I have tried all the meds they say help and they did not. I started medicating 4 years ago everyday after work , I have been headache free for four years now wow!!!!!I thought I would have to live with this forever I was wrong,,, it may not work foreveryone but it did for me