"the good: implanon was 100% effective, and very convenient. the bad: it killed my desire for sex completely. i gained 30 pounds within two months. i have a history of migraines, usually getting them every couple of months, but during the last six months of having implanon, i was getting them twice a week, with bizarre symptoms. my migraines would make me feel like my face and entire left side of my body was numb. i would forget words, i would have trouble forming sentences. sometimes it felt like i was totally disconnected from my body, and that my head was caving in. my doctor sent me to get an mri, but nothing was wrong, and they diagnosed &quot;complex&quot; migraine. had implanon removed 2 months later, and the weird migraines stopped."