Buprenex side effects and question

My 13 year old cat who is 13 pounds was given 3 syringes of 0.30cc of buprenex because of an extracted tooth. It said give one to two times a day I've only given it once it seems to work as she is eating ravenously. But she has weird side effects like dialated pupils and staring into space, wobbly, and hiding most of the day, is this normal?

I want to give one syringe once a day for the next two days then she is done with it but it says it's only for two days. Can it be given once so she will be on for 3 days?, will she be ok off it, this is her first time ever on pain killers, I thought mabye the tooth isn't hurting bad but mabye it's the meds, I hope she can eat off them! Is there any problems stopping it?

Every cat is different, so that general dose might be too high for her.  The whole purpose is to keep her pain free, but not to zonk her out since she isn't terminal. Are you injecting it with a needle or just squirting it on her gums?  It is a lot more potent and long lasting when it is injected.  Also, if you are squirting it on the gum where there's an open area from the surgery, it may be getting into her bloodstream more than it would if you were squirting it on a healthy gum area.