I am currently researching anti-inflammatory herbs, for use in salves for arthritis. Both my husband and I have osteo-arthritis and don't like to rely on OTC drugs which can be problematic for the liver and/or kidneys. My last salve was infused olive oil, with cannabis, oregano, comfrey, and some other herbs. It was a pretty loose concoction but absorbed well and seems to bring some relief. Unfortunately, I lost the precise recipe in my last computer crash, so will start anew when things start growing this spring. I also plan to try to distill oils direct from the plants -- I've read that one can put the herbs in a water bath, bring to a simmer, with an inverted lid over the water that drips into an elevated bowl in the middle of the pot. That is on my list of things to try.