About how long to take Tian Xi Pills to be effective, should depend on the severity of the patient’s condition and the length of the disease to decide. The common onset of action time is probably divided into the following cases: First, for mild patients can see the therapeutic effect after 15-20 days, of course, this also has a certain relationship with the patient’s physical condition and the absorption of the drug. Second, for moderate patients, the onset of effect may have to be extended, about 30-40 days to play a more obvious effect. Third, for severe patients, it may take more than 2 months to 3 months to see some therapeutic effect. This is because the longer the illness, the body’s resistance or immunity will decline, and even the patient’s body may produce drug resistance, so it takes longer to see the more obvious effect of the drug.