<http://www.examiner.com/x-9250-DC-Exotic-Pets-Examiner~y2009m5d25-Ferret-toxicity> mentions some very good safety precautions, but her explanation of why Tylenol kills ferrets so easily is wrong so see these for that information: http://www.ferret-universe.com/resources/ferrettoxic.pdf and http://ferrethealth.org/archive/SG2008 Hepatotoxic means that it destroys the liver. BEGIN QUOTE The progress is due mainly to the amount given - but it usually takes 24 hours or more, and it is not pretty. Tylenol is a hepatotoxin in ferrets, cats, and most other pet species (and is not the safest drug for humans). The terminal drop in body temperature is a sign of shock, not of the effects of the drug. If this owner succeeded in administering tylenol, they likely succeeding in killing their ferret. With kindest regards, Bruce Williams, DVM END QUOTES Also: http://ferrethealth.org/archive/YG3519 explains more how the liver damage occurs Notes on common causes of poisoning in ferrets from a more recent toxicology article: http://ferrethealth.org/archive/FHL4653 and the current URL of one of the ASPCA Animal Poisoning Control Centers is now http://www.aspca.org/pet-care/poison-control/ but it is a horror to navigate and try to search now where before it was very useful. Sukie (not a vet) Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/ http://www.ferrethealth.msu.edu/ http://www.ferretcongress.org/ http://www.trifl.org/index.shtml http://homepage.mac.com/sukie/sukiesferretlinks.html [Posted in FML 6344]