Anti Sickness tablets

Has anyone ever been on an anti sickness and had it affect their baby. I'm currently 10 weeks pregnant with baby number two and been on these anti sickness for three weeks I feel very sick if I don't  take them. The hospital priscribed them due to severe dehydration caused by being sick 10-15 times a day. I only had normal sickness with my first so this is very abnormal for me.