She refused to go into a clinic and withdrew its use over a period of 3 weeks. Three months have passed and she is in such pain that she talks of ending it for good. She can't work, go out over, even play with her child because she is in such pain. She seemed to stabilize at 5 times a day at 15 mg and remain at that for years. Her doctor says it will increase later on.
Patients develop a tolerance for morphine.
That is, higher doses are needed to achieve the same analgesic effect. However, it does not work in the manner that your physician is describing. Secondly, it will have addictive side effects - constipation, sleepiness, etc., but will not kill her. Lastly, there are oral morphine products that last 12 hours and would be preferable to injections. The pain relief can be achieved with less addictive potential.