Spexib Capsule is used in the treatment of non-small cell lung cancer. It shows its working by stopping or slowing down the growth of cancer cells. Spexib Capsule should be taken with or without food, 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. Fatigue, nausea, vomiting, and diarrhea are some common side effects of this medicine. Some serious side effects that might occur which need doctor consultation include tiredness, itchy skin, yellowing of your skin, and chest pain or discomfort, changes in your heartbeat. Your doctor may perform some blood tests before and after the treatment to check for liver, or blood sugar level. Before taking it, tell your doctor if you have heart disease, 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 both males and females during treatment is important to avoid pregnancy.