Is there a medical reason to change or is it only the licencing issue? I don't think nausea is a common side effect but the obvious solution would be to continue with vaginal use. You could try doing a search for Gilberts, I know there are some posts about it but I don't know if this has been covered. My own side effects from utro didn't improve, in fact they got worse the longer I used it though it didn't give me nausea.