Gan Cao (Zhi)Functions To reinforce the function of the spleen and replenish qi, to remove heat and counteract toxicity, to dispel phlegm and relieve cough, to alleviate spasmodic pain, and to moderate drug actions. Packing 100g (3. 5oz) of the concentrated granules extracted from 500g of the raw herbs. Directions Dissolve 2 3 scoops (2 4 grams) in a cup of hot water to make a tea drink, 2 3 times daily.