In my opinion, on average, 500 mg's in a 24 hr period most the time wont cause any problems...usually you have to take ATLEAST a couple hundred more mg's in order to REALLY even start concerning yourself with the idea you might have a seizure(which is what im assuming you are talking about since thats the main issue with large doses of tramadol).
Also....I don't think tramadol efffects my mood at all.....in fact all ANY opiate does it make me feel happy and euphoric....whats wrong with that?....as far as AFTER use...unless your an addict, then you should feel fine, you should just slowly come down and become baseline, its not like a stimulant where you will crash.....but if you ARE an addict, than you might have withdrawal symptoms that effect your mood...obviously....I dont really understand your point...why would taking some opiates effect someones mood?...and in what way exactly do you mean?