The time it takes for codeine tablets to work varies from person to person, and usually takes about 30 to 45 minutes to work. The analgesic effect of the drug starts in 30 to 45 minutes and is strongest between 60 and 120 minutes. The duration of action is 4 hours for analgesia and 4-6 hours for cough suppression. Kidney excretion, mainly glucuronic acid conjugate. Clinical use for more intense frequent dry cough, such as sputum volume is more appropriate and expectorant; moderate pain and local anesthesia or general anesthesia and so on. The use of this drug may cause psychosis or fantasy; weak, slow or irregular breathing; heart rate or fast or slow, abnormal and other adverse reactions. It is contraindicated in patients who are allergic to the product. Contraindicated in lactating women; known to be an ultrafast metabolizer of CYP2D6.Contraindicated in adolescent children under 18 years of age. This medication is a prescription drug and should be applied in strict accordance with medical advice.