i am sorry for your loss but this medication in reptiles can be very deadly . only reptiles specific vets should adminster this
commonly called ivomec as an injectable form this is a treatment originally for large livestock and can be easily overdosed in anything smaller. it can be lethal in reptiles if not used correctly. the most common parasite medications for reptiles are flagyl and panacure, generally invormec is used as the last option.
http://www.abvt.org/iverm.html
"In the mid-1980's, ivermectin was introduced as probably the most broad-spectrum anti-parasite medication ever. It is effective against most common intestinal worms (except tapeworms), most mites, and some lice. It is not effective against fleas, ticks, flies, or flukes. It is effective against larval heartworms (the "microfilariae" that circulate in the blood) but not against adult heartworms (that live in the heart and pulmonary
arteries).
The most common uses in small animal practice for ivermectin would include:
Monthly prevention of heartworm infection
Treatment of ear mite situations
Clearing heartworm larvae in active heartworm infection
Treatment of sarcoptic, notoedric or demodectic mange
It should be noted that doses of ivermectin used for prevention and treatment of heartworm disease are approximately 50 times lower than doses used for other parasites."
http://www.marvistavet.com/html/ivermectin.html
look here for parasite info for reptiles as well as info about ivermec usage in reptiles
http://www.anapsid.org/resources/rxdose.html
maybe these links can help you find out a bit more of why maybe she died or at least more info on the drug given to her
again i am sory for your loss
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-robin struck (new married name)
Geckoheads And Geeks