Longkorn San is a popular Japanese medicine used to relieve sore throat and has the effect of relieving phlegm and cough, and is available in both powder and pill form. The powder form can be taken directly without water at intervals of 2 hours or more, or 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.