A few years ago, I went to the doctor because I was getting headaches almost daily. He recommended prozac because he thought that stress was a main perpetrator. I know for a fact that I get headaches due to stress, so I went along with it. I didn't know the risks of taking prozac when you weren't depressed. My serotonin receptors are just fine, thank you very much. After being on them for six months, I became depressed and suicidal. It took three months to clean out my system. My awful GPA that resulted from that semester still haunts me on resumes and grad school applications.
But here's the interesting part: it did reduce the amount of headaches I got, but the severity increased. During the time I was on prozac, I began getting "ice pick headaches," which I discovered are worse than the migraines. Honestly, the first time it happened, I was terrified; I thought I was having an aneurysm.
An ice pick headache causes excruciating pain that only lasts 5 - 30 seconds, but can occur sporadically throughout a time period. For me, it ranged from having a couple episodes a day to having 10 in half an hour. The were difficult to predict and advil didn't help. And after they went away, it would feel like sore, like somebody had jabbed me with the end of a baseball bat into my temple (where the stabbing pain had occurred.)
Two nights ago, I experienced a series of these ice pick headaches. (Technically, each short, stabbing episode is a headache in and of itself.) It was the first time I've had one of those in a year or more. I wonder why I get so many headaches. I hope to find out someday.