7 weeks along with baby #2 and have been having really bad morning sickness (ok, really it has been all day sickness) so the doctor put me on 4mg of Zofran. I took the first dose this morning and within 30 minutes I was dizzy and exhausted. I basically felt like I had not slept in days. After a long nap and 7 hours latter I feel normal. My question is, will my body get used to the drug and stop being dizzy and so tired or is this kind of how it goes with Zofran? Thanks!