How long does it take for Lapatinib to be effective?

Because the effectiveness of a drug is affected by many factors, including the patient's cancer type, severity of illness, disease stage, and treatment plan. Lapatinib takes some time to achieve optimal efficacy. According to the results of clinical studies, lapatinib usually requires continuous medication for more than 4 weeks to be effective, and the first evaluation of efficacy is usually 16 weeks after medication. But this is only a rough reference time. The specific effect and the length of time it needs to be taken need to be determined under the guidance of a doctor. During the use of lapatinib, patients need to wait patiently and continue taking the drug according to the doctor's recommendations. They should not stop the drug prematurely or reduce the dose.