I take a generic for Diamox also. There is some issues with those made by Lannett (who makes mine :roll: ), that those by Taro are better.
And yes, 1000 is definitely not a max dose for this drug. Do ask your doctors why they want to limit it, especially if you are tolerating the drug well. I go for blood tests, checking my electrolytes every 3 to 4 months to watch kidney function. I also take a daily pot chlor supplement (prescription).