I got headaches on Cartia XT. On my first day, I had a headache that started about 1 hour after taking it in the morning. It lasted the entire day (over 12 hours). And, I seldom get headaches. When I do, a simple acetaminophen (aka Tylenol) usually does the trick. But, not on this headache. Since that one pill actually seemed to control my BP for that day, I decided to give it one more try. Yep, another day of a solid headache. Enough of that. Maybe this would have gone away over time. I don't know. But, I wouldn't be able to tolerate it long enough to find out.
I was sort of hoping it would have worked because it was very cheap out of pocket.