Singer's herb or Erísimo is used in infusion for its expectorant properties, being indicated in hoarseness, pharyngitis, chronic bronchitis, and asthma. Precisely because of its effectiveness in hoarseness, this plant is commonly called singer's herb. Usage: Infusion (boil for a few moments) 1 teaspoon of plant per cup of water. Let it sit for a few minutes, strain, and take 3-4 times a day after meals or applied as gargles. Ingredients: Erísimo plant.