I suffer with RSi very badly in my left arm and shoulder area and currently have a frozen shoulder to boot but get Diclofenic tablets off the Doc and I don't usually take them all the time - I have a thing about taking too many pills - I used to take 24 a day but these are wonderful - shoulder is much better and so are hands - note to self take them its only 3 a day.
Its worth getting all the right kit for the Pc our home offices are better equipped than my new job office but it makes all the difference - chair, foot rest - mine was made by a Joiner from one of my construction sites many moons ago, gel keyboard pad rest and mouse rest also splints can help as they retrain the hands - metal won't bend!
Apart from that hope you are feeling better so you can come back to Purrs quicker