No:
The patent process makes drugs very profitable because for 10 or so years other potential makers are excluded, and those resulting profits means companies can fund very risky, pie-in-the-sky research. For THAT reason US research tempo is high and the number of new drugs for the whole WORLD is high.
If drug discovery is less profitable in the USA, less research will be done in the USA. And THAT means considerably fewer drugs for the whole world.
And so my point is that the "drug field" will not be plundered directly by socialists so much as by the new market forces that come to bear.
The issue is not patent protection, but reimbursement.