Jarrow Formulas AllerTame 60 Softgels. Jarrow FORMULAS® AllerTame combines plant extracts with documented benefits to support a healthy response to airborne allergens. Petasin is a butterbur extract prepared by a patented extraction process that removes potentially toxic alkaloids. Quercetin, omega-3 fatty acids from perilla oil and the protease bromelain may promote a healthy inflammatory response to allergens; the rosemary antioxidant rosemarinic acid has shown similar effects in clinical studies.