There is an effort underway to educate primary care doctors in the safety and legitimate use of narcotic pain relievers, but it takes time to get the word out. The DEA has political reasons not to relax its stance. I am not up on Canadian health politics concerning narcotics. If it's that hard, it may be worth discussing non-narcotic options. They can cause chemical dependence, but this can be overcome in virtually every case.
Many people are hypersensitive to opiates.
The response varies with the actual molecule, but most people who get nauseous from one opiate will find it hard to tolerate another. Chemical dependence implies a physical withdrawal. Addiction includes physical withdrawal in addition to drug-seeking behavior that is injurious to oneself or others. The name is not the thing. I do apologize to all of you for this interruption.