“…[ 23 ] Interestingly, a study evaluating the effects of sildenafil, another phosphodiesterase inhibitor used in impotence treatment, on Achilles tendon healing reported positive histopathological effects. [ 32 ] In our study, while biomechanical effects were evident in the late period, positive differences were observed in all groups receiving papaverine treatment. From a histopathological perspective, the group that received local papaverine administration in the late period exhibited favorable outcomes.…”