A Sonoclot Coagulation & Platelet Function Analyzer was used to determine paraspecific neutralization of C. vegrandis, C. atrox and E. carinatus venom effects on ACT, CR, and PF by expired Biotecfar, Antivipmyn, and SAIMR antivenoms. Black bars: NSS 0.85% NaCl, Dark grey bars: venom controls (venom+NaCl), Medium grey bars: venom/antivenom samples, and Light grey bars: antivenom controls (antivenom+NaCl). NSS: normal control, Cv: C. vegrandis venom, Av: Antivipmyn antivenom, Ca: C. atrox venom, Btf: Biotecfar antivenom, Ec: E. carinatus venom, and SM: SAIMR antivenom. ** Indicates significant differences between the venom controls and the venom/antivenom samples. ##/** Indicates significant differences between venom controls and venom/antivenom samples and significant differences between normal controls and venom/antivenom samples, but the venom/antivenom values did not return to basal values of the normal controls.