Remember, Viagra LOWERS your blood pressure. I think your brain will need that blood to think clearly. Don't think you would need a "third" hiking pole at elevation.
I take an 81mg chewable aspirin about a couple of days before the start of the hike.
You may consider Diamox which appears to be the most preferred.
However, consult with your healthcare provider.
Best thing to do if you want to do "drug free" is to acclimatize at 10,000 feet plus.
