The present invention relates to compounds for use in the prevention and/or treatment of PAR-related diseases, such as for example: pain and ocular disorders. More in particular, the present invention provides bis(acetamidophenyl) guanidinophenylethylphosphonates for use in the prevention and/or treatment of pancreatitis-related pain, IBS (irritable bowel syndrome), IBD (inflammatory bowel disease), dry eye disease and conjunctivitis sicca. These inhibitors were found to have a different inhibitory profile compared to diphenyl guanidinophenylethylphosphonates leading to a more pronounced effect on these conditions.