A study at a Canadian university has found that botox injections spread into neighboring muscles and tissues. Sixty rabbits were injected with botulinum type-A toxin for this study.

"The message here really is that you have to be very careful because the drug is not so specific. It can go into other tissues and it is a toxin."

The head of the study said the results should not sound any alarm bells. But they should serve as a warning to doctors to be vigilant when targeting a muscle and to stick to the dosage that's required for therapeutic effect to minimize the toxin spread.

But as for his personal opinion about using Botox for cosmetic purposes he says "Botox is a poison. I would be completely against (putting) any poison in my body purely for cosmetic purposes."

See the botox seeping story at the Calgary Herald.

Update: April 2008, see new research released today that says Botox may spread to the brain.