After excessive drinking, stupor and unconsciousness both can occur. In higher doses, it causes drunkenness, stupor, unconsciousness, or death. Severe overexposure may cause weakness, drowsiness, and unconsciousness. At high concentrations, amnesia, analgesia, spins, stupor, and unconsciousness result. Smaller amounts COHb lead to oxygen deprivation of the body causing tiredness, dizziness, and unconsciousness. Hypoglycemia can be severe enough to cause unconsciousness during sleep. He slips into unconsciousness and dies of hypothermia. Unfortunately, the accidental breathing of pure argon results in rapid unconsciousness and probable death. Benzodiazepines can be taken in overdoses and can cause dangerous deep unconsciousness. This may be followed by confusion, unconsciousness, or cardiac arrest, as complications worsen. Betty then faints back into unconsciousness. Sufficiently large doses cause unconsciousness and death. Too low a concentration of oxygen results in hypoxia leading to unconsciousness and ultimately death. They may progress into abdominal pain, pulmonary congestion and unconsciousness. Symptoms often worsen rapidly and may progress to unconsciousness.