Prenatal Nightmares!

My doctor has suggested to me that I take prenatal vitamins along with a folic acid pill throughout the duration of my treatments. (Clomid with IUI). The problem is the prenatals make me EXTREMELY nausous! My doc has told me of it gets bad to take a gravol. Gravol knocks me out completely and I end up asleep on my couch by 5:30 for the night. I've tried taking the pills with food and without food and nothing seems to help. Has anybody else had this problem? Did anything help???? I just can't imagine the morning sickness of pregnancy with the sickness from vitamins! Please help!!