A Sonoclot Coagulation & Platelet Function Analyzer was used to determine the neutralization of B. colombiensis and C. vegrandis venoms effect on ACT, CR, and PF by Biotecfar expired 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, Bc: B. colombiensis venom, Btf: Biotecfar antivenom, and Cv: C. vegrandis venom. ** 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.