Codeine phosphate oral solution is used to relieve cough, cough, expectorant, anti-allergic, can be used to relieve respiratory tract infections caused by cough and phlegm, asthma, nasal congestion and runny nose, limb weakness, muscle aches and pains and other symptoms. 1. Cough and asthma: Codeine phosphate oral solution is mainly composed of codeine phosphate, ephedrine hydrochloride, etc., for the central cough suppressant, its cough effect is obvious, generally choose to take orally, with a certain degree of addictive properties, should not be used for a long time. 2. Expectorant: Its active ingredient, ephedrine hydrochloride, has the effect of diluting phlegm and promoting phlegm expulsion. 3. Anti-allergic:Triptolide hydrochloride has anti-allergic effect and can relieve inflammatory reaction. It has adverse reactions such as dizziness and headache, drowsiness, lowered blood pressure, nausea and vomiting, urinary retention and flushing. Nursing women, ulcer disease, liver and kidney insufficiency are prohibited. During the period of use, pay attention to a light diet, regular work and rest, and take medication according to medical advice.