What I've heard is that Glucosamine and Condroitin (not sure if I spelled it right) are often combined in one tablet(?)--but can be expensive. Glucosamine can be found by itself....my Mom is using one (I think the Glucosamine) for a problem with her ankle...I think it is the Condriotin that can sometimes cause allergic reactions in people (per what my Mom found out). It has helped her immensely--but it only works as long as you continue taking it.I would imagine you would be able to find out lots of info on these remedies from a pharmacist or other sources.
Mary