I've found two homeopathic "meds" useful for high altitude backpacking and winter ski touring. I live at just over 2,000 ft. and 8,000 ft. is the beginning of high altitude for me even though I ski patrol between 8,500 ft. and 9,500 ft. every week.
1. Ginko Biloba capsules> proven in tests by the U.S. Olympic traing site in Colorado Springs to reduce (not eliminate) headaches and nausea resulting from exposure to high altitude. Young people, even in excellent cardio-vascular condition, are more subject to mild mountain sickness than older people. Go figure… They ahould be taken 4 to 5 days before going to higher altitudes and several days thereafter.
2. NO2 tablets> Actually just one amino acid, L-Arginine, in 8 hour time-release micro encapsulation. NO2 releases nitric oxide in the blood which is a vaso-dialator, the very same gas relased in larger amounts by Viagara or Cialis and often used by climbers going above 7,000 meters.
I've found NO2 very helpful, especially for a fast "second wind" recovery. Dosage goes by body weight. More weight = more tabs. I take 4 B/C I weigh 180 lbs.
Like me you may be very leery of taking anything to enhance performance at altitude but after trying NO2 I was convinced.
Ginko Biloba may help me so I take it as a prophalactic even though I've never had altitude sickness… yet. But it even occasionally strikes people who live at high altitudes.
My feeling regarding high altitude backpacking trips is I'd rather take these meds" than have my party be forced evacuate me to a lower altitude if I got sick.
BTW, as a ski patroller schooled in HAPE and HACE problems I do know when a person MUST be evacuated rapidly to save their life. Those are TRUE EMERGENCIES, not just the more common misery of altitude headaches and nausea.

