This is the bit from the site, it relates to overdosing, and describes how she is:
Overdose
In case of overdosing, mydriasis, depression, drooling, paresis, trembling and/or staggered gait can occur in some dogs. The symptoms will disappear spontaneously within a day. No antidote is known.
I checked what 'paresis' is, my electronic dictionary says:
a condition of muscular weakness caused by nerve damage or disease; partial paralysis.
I hope it is just a reaction to the drug. If so, I'm not using those on any cat again!