A non effervescent tablet of sodium naproxen, comprising a tablet core and, if desired, a sugar or film coat, wherein the tablet core, based on the weight of the tablet core, consists of 30 to 99% by weight sodium naproxen and 70 to 1% by weight auxiliary agent component comprising at least one basic auxiliary agenL possesses a sufficient hardness, is comparatively small and leads to a particularly rapid increase in blood level and thereby to an accelerated onset of analgesic effect.