"i have lots of friends who love nexplanon and have done very well with it. unfortunately i cannot relate. i got it put in 2 months ago and have thrown up mutiple times a day, every single day since it was put in. after the first month i finally figured out the system.. i get sick anytime my stomach is empty. so even if i&#039;m not hungry yet but i haven&#039;t eaten anything in a couple hours, i&#039;ll throw up. and there&#039;s no nausea or really any warning.. i&#039;ll gag out of nowhere and i have about 30 seconds to get to a toilet because it comes right after the first gag. in order to prevent myself from puking all the time i&#039;ve had to implement a strict eating schedule. i have to snack every 2 hours. not surprisingly, i&#039;ve gained weight because  of this."