Celcarb 150mg Injection is used in the treatment of ovarian cancer and small cell lung cancer. It shows its working by stopping or slowing down the growth of cancer cells. Celcarb 150mg Injection is given as an injection into veins under the supervision of a doctor. 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.