The "PD-Depression" study is a large-scale, prospective, randomised, double-blind, placebo controlled trial conducted at 76 centres in 13 countries in Europe and Africa with 296 patients treated. The primary efficacy endpoint of the study was change in depressive symptoms as measured by change in Beck Depression Inventory version 1A (BDI). Results of the study showed a significant improvement of depressive symptoms in the pramipexole group versus the placebo group, as measured by a change from baseline in total BDI. Results of the study show:
BDI scores improved by an adjusted mean –5.9 in pramipexole treated patients vs. –4.0 in the placebo group (P=0.01)
The mean Geriatric Depression Scale (GDS) score had improved by 2.5 in the pramipexole group vs. 1.7 in the placebo group (P=0.03)
UPDRS motor scores improved by –4.4 with pramipexole vs. –2.2 in the placebo (P=0.003)
UPDRS activities of daily living (ADL) scores improved by –2.4 with pramipexole vs. –1.2 in the placebo (P=0.003)
Parkinson's disease is the second most common chronic neurological disorder in older adults after Alzheimer's. Its worldwide prevalence is estimated to be approximately one to two percent of those over 65 years.(15,16,17,18) Although traditionally PD is associated with motor symptoms (such as tremor, rigidity, slowed motion, imbalance, shuffling gait, loss of facial expression), the non-motor symptoms, including depressive symptoms, pain, cognitive impairment and sleep disorders can be significant. Symptoms can vary from patient to patient, but worsen over time. About Mirapexin®/Sifrol® (pramipexole)
Pramipexole (known under the trade names Mirapexin®, Sifrol®, Mirapex® and Pexola®) is a compound from Boehringer Ingelheim research first approved in 1997 for the treatment of the signs and symptoms of idiopathic Parkinson's disease, as monotherapy or in combination with levodopa. Pramipexole was approved in 2006 for the symptomatic treatment of moderate to severe idiopathic Restless Legs Syndrome (RLS). Pramipexole is available in over 70 countries across the globe. The most commonly (= 5%) reported adverse drug reactions in patients with Parkinson's disease treated with pramipexole were nausea, dyskinesia, hypotension, dizziness, somnolence, insomnia, constipation, hallucination, headache and fatigue. Pramipexole may cause patients, particularly with Parkinson's disease, to fall asleep without any warning even while doing normal daily activities such as driving. When taking pramipexole hallucinations may occur and sometimes patients may feel dizzy, sweaty or nauseated upon standing up. Patients and caregivers should be aware of the fact that abnormal behaviour (reflecting symptoms of impulse control disorders and compulsive behaviours) such as binge eating, compulsive shopping, hypersexuality and pathological gambling have been reported in patients treated with dopaminergic drugs, including pramipexole. Dose reduction/tapered discontinuation should be considered. About Boehringer Ingelheim
The Boehringer Ingelheim group is one of the world's 20 leading pharmaceutical companies. Headquartered in Ingelheim, Germany, it operates globally with 138 affiliates in 47 countries and 41,300 employees. Since it was founded in 1885, the family-owned company has been committed to researching, developing, manufacturing and marketing novel products of high therapeutic value for human and veterinary medicine. In 2008, Boehringer Ingelheim posted net sales of 11.6 billion euro while spending one fifth of net sales in its largest business segment Prescription Medicines on research and development. References:
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