Back in NZ, we have PHARMAC, which is basically a centralised drug buyer for the country.  It works remarkably well at keeping drug prices low <a href="https:&#x2F;&#x2F;www.pharmac.govt.nz&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.pharmac.govt.nz&#x2F;</a> - though tends to miss some niche stuff.