The present invention relates to a new use of 2-[(3Z)-6-fluoro-2-methyl-3 -[(4-methylsulfinylpheny l)methylidene] inden-1 -yl] acetic acid (sulindac) of the formula 1 to making of pharmaceutical preparations for the treatment of difficult healing different types of wounds in patients with diabetes. The medical use of 2-[(3Z)-6-fluoro-2-methyl-3-[(4-methylsulfinylphenyl)methylidene] inden-1- yl] acetic acid (sulindac) of the formula 1 shown in the figure 1 for the preparation of pharmaceutical formulations for the treatment of difficult healing different types of wounds in patients with diabetes is disclosed. A pharmaceutical composition containing 2-[(3Z)-6- fluoro-2-methyl-3 -[(4-methylsulfinylphenyl) methylidene] inden-1 -yl] acetic acid (sulindac), characterized in that it contains 2- [(3Z)-6-fluoro-2-methyl-3 -[(4-methylsulfinylphenyl) methylidene] inden-1 -yl] acetic acid of formula 1 in an amount of 1 -200 mg/ml.