Ryukaku-san is a Japanese herbal medicine used to relieve sore throat and has the effect of relieving phlegm and cough. The powder can be taken directly without water at intervals of 2 hours or more, and can be taken in warm water. If it is a pill preparation, it can be taken with water, and the general dosage is 1/3 packet once between 3-7 years old; 1/2 packet once between 7-11 years old; 2/3 packet once between 11-15 years old; 1 packet once over 15 years old, all taken 3-6 times a day.