Guaiacol Methylphenidate Granules is mainly due to the composition of three drugs: guaiacol glyceryl ether, pseudoephedrine and chlorpheniramine, this drug is a compound preparation for the treatment of colds and flu, which can stop cough and dissolve phlegm. In addition, it can treat the symptoms of nose kata, such as itchy nose, runny nose, nasal congestion, sneezing symptoms. As it is a compound preparation, especially it contains two drugs, ephedrine and chlorpheniramine, one of which can cause patients to develop elevated blood pressure and should be used with caution by patients with high blood pressure, and the other one can easily lead to the side effect of drowsiness. Therefore, people engaged in aerial work or drivers should take it at night and minimize its use during the day, so as not to cause related dangers due to drowsiness.