Gosh, I can't remember.

I had so many other side effects when I was jumped from 150 to 300 that a headache would have felt like a relief. LOL

It made me tremulous, highly irritable, dropped my BP to 80/60, gave me insomnia, blurry vision. I'm sure there was a headache in the mix because of or in addition to all of those other things.

One thing I found out, just because the package insert or PDR info doesn't say one of your side effects has been found in a study, or that because it's a "rarely occurring" side effect, don't let your doc assume that it can't be because of the med.

All I know is that once I dropped the med back to 150, my BP went back to normal within 24 hours. The product info doesn't mention a thing about it. It says it causes high BP, so my Pdoc was skeptical.

Let your doc know. Maybe he'll suggest you lower it back to your former dose. If the headaches go away, there's most likely your answer.

In the meantime, I've found that Tiger Balm (or any kind of camphor/menthol rub) works GREAT for working instantly on your headache while you're waiting on aspirin/Tylenol/ibuprofen to kick in.