Dystonia is a condition of forcible muscle contraction and it can actually be seenin PD in three different ways. Firstly, and least often it may be the earliest manifestation of the disease such as a foot cramp or toe curling. Then it can be seen as a side effect of the peak of sinemet. In other words, when sinemet's working there can be forced postures or postions of some body parts. Finally it can be seen when sinemet wears off. This last problem is best treated with sinemet-CR.