MICROGYNON® 30 ED is used to prevent pregnancy. For more information, see Section . 1. Why am I using MICROGYNON® 30 ED? in the full CMI. 2. What should I know before I use MICROGYNON® 30 ED? Do not use if you have ever had an allergic reaction to MICROGYNON® 30 ED or any of the ingredients listed at the end of the CMI.