"i have been on implanon for 6 years. before getting it i tried every other birth control excluding an iud. this has been the best one i have been on. i do not have periods, except when i start a new diet and exercise and start to lose weight. then i get one and i have pretty bad cramping but really light bleeding. i have not gained any weight that can&#039;t be explained by my own fault. the only things i would say is a bad side effect for me is that i have no sex drive at all, and i also have a lot of dryness when i do try to have sex. those are my only two complaints. i love not having to remember to take a pill every day and i love that it lasts three years. i&#039;ll be getting my third implant later this month."