LEH

We had flown from mumbai( sea level) to 11500 ft in a matter of hours so we needed to acclimatize......we had already started diamox 2 days before in mumbai....the first day here was just rest and more rest.....hog breakfast n sleep.....hog lunch n sleep....in the evening some guys wanted to go to the marketplace for a stroll.....i was feeling a bit lightheaded and very very sleepy...so i decided to stay back and rest. one strange thing i noticed here was that i was feeling very sleepy on the first day all the time.....was that due to the altitude or was that due to lack of sleep on the previous 2 nights??