Access to a specific drug, or its pricing to the patient, likely depends on if the drug is in the drug formulary in the first place and what tier level it is in.

I had to switch Medicare Part D (drug) plans here in the U.S. to get my cancer drugs covered as my old plan didn’t include Venclexta or Gazyva. If I hadn't switched plans I likely would have to resort to chemo that is covered or pay for Venclexta or Gazyva out-of-pocket. These are both tier 5 drugs.