A medicament for immediately treating painful, inflammatory and/or febrile acute diseases contains flurbiprofen as a racemate, a mixture of a racemate with its enantiomers, a pseudoracemate (mixtures of equal parts of S- and R-flurbiprofen) or as a mixture of different parts of S- and R-flurbiprofen in the range extending between pure S- and pure R-flurbiprofen as active substance in the form of a pharmaceutically applicable nanosol. This medicament satisfies all requirements of an immediate-effect pharmaceutic form.