Mountain Sickness / Altitude Sickness
"After several bird tours flirting with 10,000 - 11,000 ft elevation I became suspicious that I was  susceptible to alt. sickness.  A redirected flight to LaPaz, Bolivia (and some unscheduled ascents near Cochabamba) convinced me I was.  Typically I serve as a human altimeter, within minutes of reaching 11,000 ft I&#039;m puking my guts out.

Diamox has been a wonder drug in preventing alt. sickness on tours I&#039;ve been on since Bolivia.  I&#039;ve travelled from 8,000 ft straight to 14,000 ft several times with no alt. sickness symptoms at all.  125 mg before bed is all I need.  Tingling and bad tasting soda symptoms are greatly reduced at that dosage compared to the 250mg I initially used."