I don’t think the issue is quite that simple.
Drug development is an expensive and risky problem. Companies spend a lot of research money following leads that turn out to be dead ends. They have to make all that money back on the relatively small number of new drugs that pan out.
Well, I think it is that simple. Drugs are a good which is sold: ownership is transfered, and transfered unconditionally. The valid of your objection is valid, and that is the reason why there are patent laws. Making it an issue of property rights and supposing that drug companies have some kind of extraordinary rights after their goods are sold is wrong. Even if you wanted to try to make control over where drugs can be taken once they are sold into a contractual issue, they don’t make you sign a “I won’t take these drugs into the US” agreement.
Canada’s health care system is nationalized. This means there is one (or a few) buyers of drugs there, who buy in vast quantities. This gives them leverage, and that leverage has been used to negotiate purchase prices that are close to marginal manufacturing cost.
Uh, this sounds like it’s going to become the “Wal-Mart is coersive because it’s so big” argument. You wouldn’t do that, right? Leverage is non-coercive.
The pharmaceutical companies can’t raise their prices in Canada or refuse to sell into the market because of the danger that the Canadian government will simply ignore their patent on the drug and start manufacturing a generic version themselves. (This has apparently happened in the past.)
Well, if the Canadian government holds itself above the rule of law, that is not good, but until they actually do violate the law, this is a non-argument. The manufacturers have a choice to withdraw from that market, a right which they have not exercised: this is the primary consideration. They have the right to sell at a higher price, which have have not chosen to do.
Hence the desire by the drug companies to block reimportation.
But their desires are irrelevant. They should simply withdraw from the Canadian market entirely. You can’t have it both ways.
Blocking drug reimportation is an attempt to protect the manufacturers from the consequences of threatened property rights violations in Canada.
The argument from threat is potentially valid, but you have to establish that there is an actual threat. Can you establish this? I don’t mean, can you invent an Atlas Shrugged scenario where the Canadians nationalise a drug company For The Benefit Of The People, I mean, can you point to actual acts by the Canadian government which inescapably show that the drug companies have been threatened with a specific coercive action?
Also note that the drug manufacturers do not have the same property right to the idea that they have to the product. The former right only exists by dint of a particular statute granting the patent-holder exclusive rights to exploit the idea for a specific period of time. So if you want to argue that Canada has threatened manufacturers with violation of their rights, you have to establish what those rights are under Canadian law.