I tried them when I had morning sickness and mine only worked for 2 days then stopped :( I kept my receipt and took them back after a week of them not working. It was a nice relief though lol. The only thing I could keep down was a banana milkshake and finally after losing 20 lbs. in 2 weeks my doctor prescribed me meds. I'm 31 weeks now and just so happy I'm out of the morning sickness. I was sick up until 18 weeks. Good luck!
They do work. You have an accupressure point in your wrist which helps reduce or even eliminate nausea and the bands are made to put pressure on those points.