Rat poison usually contains a blood thinner that can cause internal bleeding, so it can be very dangerous when ingested, according to the University of Kansas Hospital. Some of the symptoms of ingesting rat poison can take hours or days to appear.
Victims of rat poison can display one or many different symptoms, including nosebleeds, bleeding gums, blood in the urine, bloody diarrhea, fatigue, extensive burning, hair loss and even shortness of breath. If a person is thought to have ingested rat poison, a doctor or the Poison Control Center at 1-800-222-1222, should be called. Activated charcoal and syrup of ipecac is available over the counter for poison ingestion, but it should never be used without the direction of a physician.