Altitude sickness

Wow, thanks for all the replies and good advice.First I am going to copy and save all the links for future reference.My last episode with AMS was about two years ago, the last time at altitude.I will schedule a new physical with my Dr. When I was about 3 or 4 years old I had some mild encounters with asthma however I never noticed it since. Could be part of the problem now.About 5 years ago at Breckenridge,the Dr at the local ER gave me a prescription for Diamox.I tried taking it for 1 or 2 days before leaving for my next trip to CO.I could not tolerate it, it made me very nervous.However it must have helped some because I had no problems that trip.But then again I would not have problems every trip.Thanks again very much for all your help.Wife and I are looking forward to a trip to Yellowstone this year, with all your help I am sure it will be much more pleasant.
Ramp and Family