Harldy a pain med - I think it's anti inflammatory - put it back in yer grandparents cabinet, they might want it for arthritis.
If it's yours however, you might try calling back and saying it doesn't do anythign for you. I had it prescribed for some lower back pain I was having and they upped me to darvocet- still not much fun, but it provides a little buzz. Beats relafen.