jerking / tickling in body

in the yr .2003. EEG was done. Result - Nothing was found.
                       Wilson's disease ( blood & urine )  done. Result Nothing  Found.
                        Stool Test done. Result-   Little-bit Acidic otherwise normal.
When in 2003 ,these jerks were very Vigorous.so  treatment started by Doctor
by prescribing: DESVAL ER -1000 & TRIAMINC  twice daily.
In 2004 end. This Desval ER -500 n Triaminc was advised.
But problem was not totally cured, it persist just 5%, i.e. occassional jerking OR  Winking of eyes. or Jaws in mouth.
Whenever these JERKS/Tickling use to increase DRs. uses to increse the
DESVAL by 500 or 750 OR by TWICE daily or by 1000,, and treatment continues. Unfortunately  my son never cured tottaly.
In 2005  when all of sudden Dr, decreased the DESVAL - ER by 250 once daily
it was found that his jerking has relapsed, started jerking vigourousely. but more than ever.
Therefore another NEUROLOGIST Dr. under  his treatment changed the medicne. as follows.-
Revocon