Hi, I had my first Reclast IV on Monday and had similar side effects that are mentioned on this board. First night I woke up with a big headache and had to take Tylenol every 4 hrs to handle that. Then came the nausau sort of like bad morning sickness early in the AM. I couldn't get out of bed, later I felt better, I'm on day 2 and still nausaus and dizzy. I won't drive until it goes away. One positive is I don't have the awful heartburn I had w/Actenol. But this nausau and gas is not so great. Can anyone tell me when it dissipates??? I hate wishing my day away to be done with these side effects, the flu part is gone now it's more like vertigo and stomach issues? I want to hear from others out there.