2-(2-Oxo-1-pyrrolidinyl)acetic acids of the formula ##STR1## wherein R.sup.2 is hydrogen or lower alkyl and R.sup.11 is hydrogen, lower alkanoyl or another group readily cleavable by means of ammonia, are described. The compounds of formula III of the invention are useful to prepare the compound of formula I of the invention which are useful as medicaments, for example, in the form of pharmaceutical preparations.
The present invention relates to methods for the treatment of patients suffering from or susceptible to a hyperkinetic movement disorder such as a tic or tremor. In preferred aspects, the invention provides methods for treatment of tic disorders including Tourette syndrome by administration of one or more pyrrolidone compounds possessing anti-convulsant activity.