@Arkshine - I searched. But I couldn't find the exact thing. Anyways, so you mean I should get the entity's value of pev_dmg_take inside TakeDamage Post Function and ignore Float:damage parameter?
PHP Code:
static iDamage;
iDamage = floatround ( entity_get_float ( victim, EV_FL_dmg_take ), floatround_floor );