What size tablets did you get? I think the newest ones are 125 mg. Since you got headaches just going to 9k, I would start taking it the morning you leave for Horseshoe Meadows. But I'd only take half a tablet twice a day. Then if you still have symptoms, increase to 125mg twice a day. Some doctors will prescribe twice that amount, but I'd not try that until I felt like I needed it.
Yup, they're 125mg. Sounds like a good plan.
The headache brings up another question: Do you drink more than a cup of coffee each day, and do you change that habit when you go on a trip? I found that I would get a headache any time I'd go "off coffee" when I was drinking several cups each morning. I've cut back to the half-caff variety, and that seems to help.
I don't drink coffee at all (I'm a tea drinker, though.) My husband is trying to cut back on his consumption, though, since he doesn't want to carry the amount of creamer he deems necessary to make his coffee palatable!
