You would need a prescription from a Canadian doctor, and Xtandi at full retail would still cost around CAD 3,250 (USD 2,450) / month.

The Canadian price is a lot better than USD 13–15,000/month for someone without insurance in the U.S., but still not cheap. One month's supply from Canada without government coverage would be more than the U.S. Medicare deductible for the full year (even before the cost of travelling to Canada to get a prescription).