Acetazolamide for altitude?

Has anyone taken acetazolamide to help in adjusting to altitude? It's used by mountain climbers for altitude sickness. I'm wondering if it would be effective at more moderate altitudes (about 7,000 feet) to avoid several days of feeling crummy. @bikefixed?

I used it recently at Breckenridge (10,000feet). I felt awful when I got there, wish I took the med proactively 2 days before. I was horribly sick, needed oxygen,etc. Felt totally fine in Denver (5,000 feet). They say the diamox (brand name) is much more effective to prevent it- so take it for 2 days before you get there and during. I didn't find it too helpful when I took it after I felt bad. But,,, at 7,000 feet your odds of feeling ok are much better.

Did your doctor prescribe it? Sadly, I don't have time for a doctor's visit before I leave. I was planning to buy it without a script in a Mexican pharmacy as soon as we land (that's where we're going).

ETA: I PM'ed you.

I used it in my Kilimanjaro climb (18,000 ft). It definitely works. I took it before getting to altitude. Drink plenty of water and also try to minimize exertion. If you take it, it will change the taste of everything carbonated and you will pee a lot - relatively minor side effects.
There is also a more powerful steroid - dexamathasone - which is faster acting and alleviates the symptoms of altitude sickness (but not the cause) and has more potential side effects. I brought that with me but didn't need to take it.

Doctor can call it in or can go to a travel doctor usually can do fast appt