[quote=Jannah]
I think it's also worth noting that the drug was probably given to adults before this and children will often to react to things differently.
[/quote]

True. It's one thing to test on a willing and consenting adult.
Having children be test subjects would be highly frowned upon and is probably illegal. 
Even if said child is consenting purely from their own free will.

Though I don't doubt they have some way of testing the effects on children, but we can't be sure how much of that kind of testing has been done yet since it hasn't even been released yet. In america no less who has even lower standards than Canada... and Canada even had drugs/medicine go bad time to time.