Stage 4 , also known as overdose , occurs when too much anaesthetic medication is given relative to the amount of surgical stimulation .
The patient has severe brainstem or medullary depression , resulting in a cessation of respiration and potential cardiovascular collapse .
Stage 4 , also known as overdose , occurs when too much anaesthetic medication is given relative to the amount of surgical stimulation and the patient has severe brainstem or medullary depression , resulting in a cessation of respiration and potential cardiovascular collapse .