> Day 2 I did not take it, hoping that the ummm... 'crappy' side effects would dissipate before we started our Whitney overnight hike on Day 3.

Not sure what your "crappy" side effects are. "Buzzing" or tingling fingers is the most common one. I've only felt that once.

Normal dosage for AMS is 125 mg twice a day as the maximum, and some people take half that. Were you taking more?

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When I am not feeling well, but not bad enough to be in bed and no fever, I'll still do a workout, but I just go lightly -- maybe half the usual. I think the warmup and increased circulation helps me get over whatever is bugging me.