Cycloxan 500mg Injection is used in the treatment of different kinds of cancers. It is also used to treat kidney disease known as nephrotic syndrome in children after other treatments have not worked. It may be also used to treat other conditions, as determined by the doctor. Cycloxan 500mg Injection is given as an injection into a vein by the healthcare professional, but better if injected at the same time every day. 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 vomiting, nausea, hair loss, fever, and blood in urine. If they do not go away or get worse, tell your doctor. There may be ways of preventing or reducing these effects. It is very strong medicine and some people may develop serious side effects while taking it. This medicine may lower your ability to fight infections and lead to problems with your blood, liver or kidneys. Your doctor will advise you regular blood tests to check for these. It is advised that you drink extra fluids so that you pass more urine. This will help prevent bladder and kidney problems and keep your kidneys working well. Before taking it, tell your doctor if you have 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 doctor 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.