Got migraines? Think Petadolex! by lin laboraties. Butterbur root extract (petasites) is an herb that is classified Option Level “A” by American Association of Neurology medical guidelines-and Petadolex is the brand of petasites neurologists recommend because it is manufactured to meet Germany’s high standards for supplement purity. Plus, its patented extraction process removes butterbur’s naturally occurring liver toxins to give you a safe product you can trust. Petadolex achieves its protective effect by improving the tone and circulation of blood vessels. Unlike prescription drugs that can cause serious side effects, Petadolex has no known drug interactions and the most common side effect is mild burping which is usually temporary. Convenient adult 75mg strength dosage. Adults take one gelcap in the morning and evening. 50 Gelcaps per bottle (one-month supply). (50mg is available for use with children) NOTE: The quality of butterbur products is critical!