What's best medicine for tic? levetiracetam, valporate or topamax (topiramate)? which one has less confused side effect?

Hard to say: Picking a medication for a particular problem such as tics is not so much of an EENY MEENY MINEY MO type of endeavor as much as it is one which must take into account the entire clinical picture of the patient, the age, the gender, other issues that are afoot in that patient. The best treatment is to discover the cause of the tic disorder which can be inherited or acquired then, go from there.