"i&#039;ve had implanon for about a year and a half. i have to say that this is the worst birth control that i have personally used. after reading some reviews below now i know it is in fact the birth control. i have had severe mood swings, i gained 110 pounds in the year i&#039;ve had it. i&#039;ve also had hair loss and headaches. this will be coming out within a few weeks, and i can&#039;t wait."