Thanks for writing in to Healthcare Magic!
The medicines should be store high enough to be accessed by children to avoid such incidence.
Thank God you got it by chance, what would have happened if the child could have done it unnoticed.
you have done the right thing, immediate vomit was a good thing.
In hospital they do gastric lavage to remove remnant drug, still if beyond one hour significant drug gets in blood.
She may have life threatening arrhythmias and fever
and has to stay in hospital for at least 24 hours and if becomes sick then till she gets better.
If you have any further query please let me know I would try to answer it for you.
Wish you a great health!