I've been on Ortho Tri-cyclen for about three years, it's the only pill I've ever taken and it always works well, but every month when I start a new pack, the I ALWAYS throw up the night after taking the first pill. I have a sensitive stomach as it is, but I'm pretty convinced that this is the cause of it. Does anybody else have this problem? Is there a decent way to prevent it? I don't always have the time to eat a full meal when I take the pill (which I'm sure you're probably supposed to) so that might be part of it.