It is most effective if you take it at
the same time daily, so I set my alarm on my cell phone to go off daily at
the same time. If you start experiencing nausea while taking it, changing the time can work in some cases.
My friend has the Mirena, and after a while, she stopped having periods altogether while on it. You replace it every five years if you continue to need it but can have it removed if you decide you want to get pregnant sooner. It's an IUD but has hormones.