Is Low Blood Pressure Level A Matter Of Concern?

Hi, My Husband is suffering with painful burning and itchiness of the eye, abdominal pain, blood pressure dropping at an fast rate, along with a mild faint episode for about a couple of seconds, He thinks that it might be because some food we recently ate could have been tampered with, But he is doesn t feel the need to be rushed to the hospital. However he is sleeping now and the more his symptoms dye down and he begins to relax his blood pressure steady drops. when the symptoms started it was at 66 now it s dropped from 56 to 50 is he ok? and is it possible his food could have been tampered with and this is his body telling him something is majorly wrong????