Single-Herb Tinctures › Echinacea Image 1 of 1 Echinacea from $12.99 Echinacea purpurea is an immune stimulant often used both to prevent illness and at the start of a cold or flu. Size: Select Size 1 ounce 2 ounces Quantity: Add To Cart Added! Echinacea purpurea is an immune stimulant often used both to prevent illness and at the start of a cold or flu. Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More