i tried 100mg amantadine for a few days and then quit, couldn't sleep and lost my appetite. just my experience, everyone is different and one could make the argument that i should have given it more time. just wasn't that bad off - no dyskinesias, off times pretty predictable and due mainly to eating protein - so didn't have the incentive to give it more time. i know many people that do just fine on a cocktail of amantadine, requip and stalevo.