The sciatica patient can be helped very easily.
The cancer patient can certainly be palliated with homeopathy. He or she should be able to get through his final days without pain or suffering, even if a cure cannot be found. Arsenicum is a big remedy here that would be needed in at least a 30C, and I would want to have ascending potencies up to 10M for pain, restlessness, anxiety, fear of death; plus it is a cancer remedy itself with an affinity for the respiratory and digestive systems and it's just invaluable in cancer. Cadmium Sulph is another cancer remedy that could help someone with stomach cancer or just if there's a lot of nausea or vomiting as part of the case. Alfalfa tincture, 5 drops in 2 oz. water three times a day for emaciation and appetite loss. Aurum for bone pains worse at night and despair. So, you see, there's a lot homeopathy can do even if it's too late for a complete cure. Of course, they also say that the cancer patient is in severe vitamin C deficit, so any way more vit. C can be safely given would also help.

Snoopy