Pain is not fun. Way back in 1973 I was laid up in an LA hospital recovering from surgery, zoning out on Valium. A friend smuggled some marijuana brownies into my room. When the Valium wore off, I ate a couple brownies, took a relaxing vacation from pain and discomfort, and then ate a couple more about six hours later. The relief was far better than Valium, plus it was not addicting, but it did make me crave more brownies, pot or not. That could be a win-win, especially if you have cancer and no appetite.