The purpose of this trial is to study the effect of the association levodopa/carbidopa with plantago ovata husk in Parkinson´s disease patients of recent diagnostic, that are being treated with levodopa/carbidopa.

Although the treatment with l-dopa is the election treatment for Parkinson´s disease, a high number of patients develop motor complications, including, fluctuations and dyscinesia after some years of treatment.

The origin of the fluctuations is not well established, but it could be attributed, al least partially, a pharmacokinetics factors. So that, it could improve the answer and reduce the adverse reaction if we reach more stable levels of L-dopa in the circulation. The first experimental studies in animals showed that Plantago ovata husk has an influence in the pharmacokinetics parameters of L-dopa, obtaining more stable levels.

Inclusion Criteria:

• Patients with diagnostic of idiopathic Parkinson disease, with well controlled symptomatology with administration of l-dopa/carbidopa.
• At least 3 months of treatment continued of levodopa.
• Patients that give the their consent to participate in the study.

Exclusion Criteria:

• Patients with diagnostic of idiopathic Parkinson disease, with bad controlled symptomatology with administration of l-dopa/carbidopa.
• Patients with allergic predisposition to Plantago ovata husk or other contraindications for its use.