How can Norway, Finland and Denmark prevent anticancer drugs from mysteriously disappearing after being included in the medical insurance catalogue?

In fact, these drugs have not disappeared, but hospitals don't sell them, because every hospital has a social security limit, and hospitals will be punished after using them. However, targeted drugs are expensive and will occupy a lot of social security limits, so hospitals hide these drugs in the snow to give charcoal, so patients can buy them at pharmacies outside the hospital without occupying the social security limit of the hospital.