NOW Butterbur is actually a combination of two medicinal herbs, butterbur and feverfew herbs. If you've ever researched herbal approaches to migraine headaches, you'll immediately recognize both butterbur and feverfew as perhaps the best-studied herbs for migraines and certain other types of headaches. While not a treatment for migraine headaches, butterbur and feverfew may be able to reduce their frequency and severity with daily use.