"i have had the implanon for almost 2 yrs now and i wish i would have never had to switch from the patch. when i was on the patch i had no problems, no weight gain, very regular periods, no acne. i had to switch to implanon because i can&#039;t use a birth control with estrogen. since starting implanon my periods are very irregular. in fact, i bled for the first year and a half with maybe 2 wks of a break total. the only good thing i can say about it is, i haven&#039;t gotten pregnant. my skin also changed, i have never had a problem with acne and now my forehead is oily and constantly breaks out, as does my back.  i have also gained a total of 10lbs which i can&#039;t say it totally caused by implanon. i plan on taking my implanon out soon and finding another method."