360 mg pr day of morphine sulfate is that a huge dose?

ok, I have my dizzy problems, well my husband had chronic headaches(possibly due to head trauma),daily for years.Well he went to a headache expert(same 1 I go to) and he tried many different treatments with him, nothing worked except the last treatment 360 mg of morphine sulfate pr day.It has stopped his headaches but this seems like a very high dose of morphine, doesnt it?Oh, he drinks a couple beers on the weekend too…I know thats not good!