Posted by iHerb Customer on Sep 16, 2006 | Verified Purchase
I did a lot of research into a reputable brand of butterbur. It is important to go with a trusted company, because there are harmful components in butterbur that must be extracted be it can be used. Petadolex is an excellent brand. I started taking the butterbur about a month ago and my migraines have decreased in both frequency and intensity. I have tried so many medications to prevent my migraines, and so far this has been the most effective. The only side effect is occasional burping, but it is not that noticeable -- and much better than having a headache--or the side effects of medications like Relpax! I've never written a review like this before, but I have hope that butterbur will help people suffering migraines like me.