Hi Diana, I am not defending for morphine but in my case, I had taken it when I started treatment and about 2 to 3 months post treatment. I didn't feel any side effect on my brain. When I was hospitalized for 3 weeks because of weight loss, high fever and pneumonia, I had morphine drip 24 hours a day. The only side effect was serious constipation. I am not sure if it was the effect of morphine, I did not feel great pain throughout or after my treatment. There wasn't any problem with addiction either. When I decided to quit the drug, I stopped it and switched to penadol only.

Karen stage 4 tonsil cancer diagnosed in 9//01.