It is not possible to generalize how many times a targeted drug should be taken to see the effect. Some patients who are sensitive to targeted drugs may be able to see the effect in 1 to 2 weeks, while some patients may need 1 to 2 months to see the effect. Targeted drug effect time depends on whether there is a corresponding gene mutation target and the degree of sensitivity, if the targeted drug sensitive patients may be 1 to 2 weeks or even a few days can be obvious effect, not too sensitive patients may be 1 to 2 months effect, targeted drugs although fast-acting but drug resistance is serious, in the clinic if you want to improve the efficacy of the targeted drug, you should look for a clear target of targeted drug therapy target. Only when a clear therapeutic target is detected can targeted drugs be selected to obtain the desired therapeutic effect, and patients should choose the appropriate targeted drugs under the guidance of their doctors.