Sure, it sucks to be one of the people that needs the medication.
But being ethical isn't the same as being nice.
So far, what I've heard as "unethical behavior" is really meaning "behavior which I think is mean", or perhaps "behavior of which I disapprove."
If the drug was being sold by a publicly traded company, where the board has a duty to achieve the corporate goals, and those were stated to be increasing dividends, then it would be unethical to *not* raise the price. Outside of an additional value, e.g., company reputation, or the possibility of triggering regulatory scrutiny, a board member would have a *duty* to raise the price.
Thx!
TomB