"in the beginning i had bad headaches, vomiting &amp; non stop periods. now after 12 months of this the only issue is weight gain. but having a small stomach i only gained 5 pounds. i have gained and lost (w/o exercising). i would say this is really effective but with side effects not so much. i went to see my doctor about my periods last time i went in she said if it doesn&#039;t stop after this cycle i should change birth controls. and is has she was right! if you think you will stop your periods so soon stop assuming and give depo a try! its super effective and i&#039;ll definitely continue using it!"