Hematocrit-corrected platelet counts (X) before, and after bleeding period: (a) in normal rats, BPC 157 (10 μg/kg, 10 ng/kg), L-NAME (5 mg/kg), L-arginine (100 mg/kg) given alone and/or together,applied intraperitoneally, at 30 minutes before amputation while controls received simultaneously an equivolume of saline (5ml/kg intraperitoneally); (b) in heparin (10 mg/kg intravenously) challenged rats when treated with BPC 157 (10 μg/kg, 10 ng/kg), L-NAME (5 mg/kg), L-arginine (100 mg/kg) alone or combined, intravenously, immediately after intravenous heparin while controls received simultaneously an equivolume of saline (0.5 ml/kg intravenously); (c) in warfarin rats (warfarin given intragastrically (1.5 mg/kg) once daily for 3 consecutive days, with the last challenge was at 3 hours before the bleeding procedure). BPC 157 (10 μg/kg, 10 ng/kg) was given immediately after any warfarin challenge, intragastrically while controls received simultaneously an equivolume of saline (5.0 ml/kg intragastrically). We applied L-NAME (5 mg/kg), L-arginine (100 mg/kg) alone or combined, intraperitoneally, at 30 minutes before amputation. Mean ± SD, *P<0.05 at least vs. control, 10 rats at least per group.