DIDANOSINE, ddI is an antiretroviral medicine. It is used with other medicines to treat HIV. This medicine is not a cure for HIV. This medicine can lower, but not fully prevent, the risk of spreading HIV to others.\n \nThis medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions. With the Patient Assistance Program from PAN Foundation, contact the program to see how they can financially help you out.