original_query: What are the severe constitutional symptoms that usually pass off within twenty-four hours?
query: What are the severe constitutional symptoms of viper envenomation that usually pass off within twenty-four hours?
answer: Severe constitutional symptoms of viper envenomation include great prostration, vomiting, diarrhea, cold clammy perspiration, and an extremely feeble pulse.  In severe cases, an imperceptible pulse and cold extremities leading to coma may occur.