Hello. I started taking Dex about 11 weeks ago. I think the effects I started feeling took about 1-2 weeks,BUT now I am better as far as not feeling so nervous and dizzy. As far as the eating and acne well they still are there! My body I guess is "used" to the Dex now. So if you have any side effects (nervousness,dizzy or anyother) they will probaby lessen with time or go away. I hope you dont get any, but just remember its for a good reason and think of what you are doing for your baby! Good luck and stay positive. I should hopefully know by next week if I can get off of Dex!! I will have you in my thoughts! Thanks Amber