"i have been on the nexplanon implant birth control for 1 year now. my experience has been horrible. besides mood swings and the irregular periods... i gained over 40 lbs in one year without change of exercise or eating habits. on top of that i got acne like a 15 year old... i&#039;m 22 and i had horrible acne. i now have an appointment in 3 weeks to get the implant removed i&#039;m done."