Mifepristone and Misoprostol (Cytotec) are the two mostly used medications for medical abortion. Mifepristone, also known as RU486, is an antiprogesterone medication which is the only FDA approved non surgical option for termination of early pregnancies. It has a 96-98%success rates when used properly.
This medication is used to prevent stomach ulcers while you take NSAIDs (e.g., aspirin, ibuprofen, naproxen), especially if you are at risk for developing ulcers or have a history of ulcers. Misoprostol helps to decrease your risk of serious ulcer complications such as bleeding. This medication protects your stomach lining by lowering the amount of acid that comes in contact with it.
This medication is also used in combination with another drug (mifepristone) to end a pregnancy (abortion).