I am sorry for your loss. Not all Triaminic products have acetaminophen in them, but apparently the one that you have, does. Many people wonder why I don't generally prescribe medications for ferrets with influenza or other mild upper respiratory infections, and unfortunately, this is the exact reason why. Tylenol (acetominophen) is a very toxic drug in ferrets. Any product containing acetominophen is not suitable for animals, and we don't even use this product in my household for the humans. This drug is exclusively metabolized by the liver, and even a small amount generally overwhelms the liver's ability to detoxify it. Once that is breached then the breakdown products of this drug bind to proteins in the liver cells, rapidly killing the cells, and sending the animals spiraling into liver failure. In humans, it has a very low level of toxicity, and I am constantly amazed at widespread usage. Normal doses have been known to cause liver damage in persons who take tylenol with alcohol, and a dosage of only 5-6 times normal may result in death in children. It is a commonly abused substance in suicide attempts by children and teens. But the key is that in animals, it is a killer. While this is indeed a tragedy, I am hopeful that others may learn from your misfortune, and will think twice about giving any human medications to their pets without a veterinarian's advice. On a side note, the liver failure occurring with acetominophen is rapid, fulminant and deadly. When clinical signs appear, the chances of a pet surviving is minimal. In the case of this type of Triaminic, it appears that ANY dosage, 3 ccs or not, would likely have been fatal. With kindest regards, Bruce H. Williams, DVM, DACVP Join the Ferret Health List at http://groups.yahoo.com/group/Ferret-Health-list [Posted in FML issue 3418]