"i started off with implanon, i loved it and was great. when it timed out the doctors switched my implanon out with nexplanon, assuring me it was an even better form of implanon. what i can tell you is that the nexplanon is highly effective, no pregnancy scares here. but what i can tell you is i&#039;ve had some of the worst cramps of my life on this. sometimes it&#039;s regular cramps and sometimes it&#039;s so severe i throw up. i have stuck it out for over a year with nexplanon but after no explanations for the pain- i am ready to have it removed. the three years on implanon were good but nexplanon is not so much. and don&#039;t get me started on the day to day feeling of just being sick all the time. i hope this post help some of you."