Mike,
Acetazolamide is what the doctor prescribed, I would try a different pharmacy, went to Walgreens and they had it for me.
On the side though, started my Diamox regime yesterday (in preperation for my summit attempt this weekend), and my fingers are tingling like crazy even as I type!

These are the few things you have to put up with Diamox. Another important note, is that Diamox totally dehydrates you, so make sure you are drinking TONS of water. Otherwise you will be totally dehydrated and that is an absolute No-No on the trail. I have been drinking over a gallon of water but when I went to the gym, I started cramping after about 60 mins of Cardio. You don't want that to happen to you.
I am also popping a couple of garlic pills per day to see if that helps. I might switch to that from Diamox on my next trip. While I hate the after effects of Diamox, I hate AMS even more, the last time I tried a 14er in my pre Diamox days, I was sick as a dog. So a little bit of tingling is not bad for a couple of days. Specially when work constraints prevent you from taking the best remedy for AMS, Aclimatization!
Rgds!