I have been on Quasense for almost 2 years now, I haven't had too many side effects just dizziness, tired, easily annoyed, and sickness at the start of every new package ( like i said, not too many *rolling eyes*). The one side effect that has been the MOST annoying is after every period when i'm starting my new pack I get the symptoms of a bladder infection that lasts about a week. I have gone to my doc's and they have tested me for a bladder infection and i never have one. But every 3 months, the week i start my new pill pack..here it comes again!!!! uuuggghh