Sierra Dave: yours is an aggressive schedule. Take a one-day (125 mg twice 12 hours apart) and see how you feel. Some people (including myself) take half that. If you take it at home, you will see how it affects you. The diuretic effects only hit you the first day. After that, your water intake balances out.
Dex is not used much on Whitney -- at least nobody talks about it here. It's generally used if HAPE or HACE symptoms show up, which is another level of AMS over and above what most people experience.
