Etonogestrel
"I'm about to have my Nexplanon taken out as it's the end of my three years. Would I recommend this to someone else? Eh. For the first (literally) two years the periods are so sporadic I never went anywhere without a tampon. They weren't heavy but they lasted for WEEKS. No telling how much $ I spent on tampons. Then I'd go a month without any spotting, then a month of straight spotting. Finally, year 3, it has become much more regular.
 I didn't have any weight gain but I did have acne pop up all over my chin & cheek bones- I haven't had acne since middle school. 
Overall- it's effective, but I'm sick of the acne. So. Much. Acne. 
So no, I won't be getting it reinserted."