DU Knib 250mg Tablet is used in the treatment of breast cancer. It works by stopping or slowing down the growth of cancer cells. It is either used alone or in combination with some other medicine to cure advanced-stage breast cancer. DU Knib 250mg Tablet should be taken on an empty stomach or an hour before or 2 hours after a meal. The dose and duration vary according to the severity of your condition and your response to treatment. Take it exactly as prescribed to avoid serious side effects. It may take several weeks or months for you to see or feel the benefits but do not stop taking it unless your doctor tells you to. The most common side effects of this medicine include nausea, headache, back pain, and breathing difficulty. It may cause severe diarrhea, drink plenty of fluids or consult with your doctor if it bothers you. You may be asked for regular monitoring of blood pressure while taking this medicine. Inform your doctor if you notice a severe headache, confusion, problems with your eyesight, nausea, or vomiting. Your doctor may check your liver function before, during, and after treatment with this medicine. Before taking DU Knib 250mg Tablet, let your doctor know if you have liver or kidney problems. Many other medicines can affect, or be affected by, this medicine so let your healthcare team know all medications you are taking. This medicine is not recommended during pregnancy or while breastfeeding. The use of effective contraception by both males and females during treatment is important to avoid pregnancy.