The new medicine, based on the findings of Nobel prize winning scientist Arvid Carlsson, is set to replace the only other treatment for the disease.
Huntexil is the name given to the new medicine which has been found to relieve the disease's tension and tremors without the secondary side-effects of existing drugs.
The next stage in the development of Huntexil is to have it approved as a medicine with its prospects to date reported to be bright.
The company responsible for the research is called Neurosearch, a Denmark-based firm with a subsidiary in Gothenburg. The firm emerged from the group of research scientists working with Arvid Carlsson.
Arvid Carlsson is a Swedish scientist who is best known for his work to develop a method for measuring the amount of dopamine in brain tissues and it effects on Parkinson's disease.
Carlsson was awarded the Nobel prize in Physiology or Medicine in 2000.