Xovoltib 20mg Tablet is used in the treatment of non-small cell lung cancer. It is used in the treatment of adult patients who have certain mutations of epidermal growth factor receptor (EGFR). Xovoltib 20mg Tablet should be taken on an empty stomach, but try to have it at the same time every day to get the most benefits. Your doctor will decide what dose is necessary and how often you need to take it. This will depend on what you are being treated for and may change from time to time. You should take it exactly as your doctor has advised. Taking it in the wrong way or taking too much can cause very 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 diarrhea, rash, dry skin, and nausea. Diarrhea can be serious sometimes so take medicine to treat it as prescribed by the doctor or stay hydrated. Your doctor may advise for some blood tests while you are taking this medicine. It may also make your skin sensitive to the sun, so use sunscreen and wear protective clothing if you have to be in sunlight. Inform your doctor if you notice pain or redness in the eye or dry eye. Before taking it, tell your doctor if have a breathing problem, liver, or kidney problems, or are taking any medicines to treat infections. Many other medicines can affect, or be affected by, this medicine so let your healthcare team know all medications you are using. This medicine is not recommended during pregnancy or while breastfeeding. The use of effective contraception by females during treatment is important to avoid pregnancy.