Herbal Apothecary › Mullen - Tincture Verbascum thapsis (local BDF) Mullen - Tincture Verbascum thapsis (local BDF) from CA$17.50 Verbascum thapsis is known to heal and protect lung tissue, reduce mucous production, and soothe cough and sore throat. Size: Select Size 50 ml 100 ml Add To Cart Added! Verbascum thapsis is known to heal and protect lung tissue, reduce mucous production, and soothe cough and sore throat.