birth control
"I used implanon for 6 years and won the lottery in side effects- no periods and the first 6 weeks I actually felt euphoric! Has anyone else had that?  My mood went down after that but I felt like it stayed slightly above average for me the whole time on it. So for me it wasn't just birth control but an anti depressant. I went off it 2 years ago as we would be OK falling pregnant now and have been really struggling with mood swings during my periods. I hate it. My friend who had major depression in her trends found the same side effects as I did- more even moods and more productive."