My husband has stage 4 prostate cancer. He had his prostate removed in 2010, but the cancer had spread to his bladder. His PSA began to rise in January and was doubling about every 4-6 weeks. He began taking the oil on 5/5, and his PSA has not risen since he started the therapy. I have managed to grow enough so far to make his medicine. I am not sure that it will cure him, but it seems to have stopped the progress of the disease for now. I will continue to grow and make the oil until I get busted or he is well. I wish the best for your friend. I hope that you can find a way to get enough mj to make the oil for him. I make it with an oz of mj at a time and it is enough for about 4 days. Mixing it with coconut oil and lecithin is supposed to make it easier for the body to absorb. I bought the big 1000mg gel caps and give it to him that way, it tastes pretty rough! Sativa will work just fine. It won't have the sedative quality of indica, but it is the THC that is important. If I had any to spare I would share with you. Maybe someone on this forum can help. I hope so.