Very interesting what you're saying, because that's the first time I heard that it IS actually good for arthritis. Looked it up, turns out we're both right! For arthritis, it is used mainly in gels, for topical application and at low potencies, I assume because it relieves pain and inflammation locally. If it's in pill form, it's not targeted enough, or not enough of a silver bullet to help with arthritis, so they put a few others in there like Bryonia, Dulcamara, Rhus Toxicodendron that I recognize as the big names for arthritis. However, there is a lot of debate in homeopathy if mixing remedies should be allowed, in classical homeopathy only one is given at a time, then changed with another if needed, but only one at one time. Of course, everyone - the ones who practice classical homeopathy and the ones who mix them together - everyone says their method is superior.
About the remedies being made from poisons - yes this is very true, some of them are made from poisons, for example lead, arsenic, different poisonous plants, but they are extremely diluted (no danger whatsoever) and also shaken in-between the dilutions. Nobody understands how they work, but on the other hand nobody understands how a lot of other drugs work, or how acupuncture works, we can only see what happens, not how or why it happens. Big Pharma likes to malign homeopathy and lie and call it poison but they do happen to manufacture pharmaceuticals that are in direct competition with homeopathic remedies. Another way to attack homeopathy is by calling it sugar pill or placebo, mmmkay, then why does it work on babies and animals? They don't know what's going on, so how can they self-suggest themselves?