"i have been on mirena for 4 years now. it has been good so far, i have not had a period or spotting in almost 4 years. i haven&#039;t gained any weight (but i do feel bloated from time to time). the only down side is my sex drive has nose dived. i used to always be ready to go another round but now i have no interest which causes me to get a little moody but the positive out weighs the negative."