Data indicated comparable efficacy and safety for extended release and immediate release formulations of pramipexole
SEATTLE, April 29 /PRNewswire/ -- New findings from two double-blind studies investigating the efficacy, safety and tolerability of pramipexole dihydrochloride tablets in an extended release, once-daily formulation, for the treatment of Parkinson's disease (PD), are being presented today at the American Academy of Neurology (AAN) 61st Annual Meeting in Seattle.
The first study compared the efficacy, safety and tolerability of pramipexole extended release versus the currently available pramipexole immediate release formulation and placebo, in patients with early PD (those who have early symptoms), treated for up to 33 weeks. A statistical analysis conducted at week 18 demonstrated that the pramipexole extended release formulation was superior to placebo and had comparable efficacy to the pramipexole immediate release formulation. Further analysis among the 84 patients who completed the 33 weeks of treatment indicated maintenance of efficacy.
"It is important to provide patients with a treatment regimen that suits their individual needs," stated Robert Hauser, MD, Professor of Neurology, and Director, Parkinson's Disease & Movement Disorders Center at the
The second study, also conducted in patients with early PD, assessed the efficacy and safety of an overnight switch from pramipexole immediate release to a pramipexole extended release formulation, at the same daily dose. 84.5 percent of patients who completed the study were switched successfully, meeting the primary endpoint.
About the Studies
A randomized, double-blind trial comparing pramipexole extended release and immediate release formulations versus placebo after 18 weeks and 33 weeks of treatment, in patients with early PD:
*The Unified Parkinson's Disease Rating Scale (UPDRS) is a comprehensive tool, which was developed to follow the longitudinal course of PD-related disability and impairment. The UPDRS II+III score was used as the primary efficacy endpoint in both trials. UPDRS Part II relates to activities of daily living and UPDRS Part III relates to motor symptoms. The UPDRS II+III score ranges from 0 (no disability) to 160 (worst disability).
A 9-week, double-blind, randomized, parallel-group study conducted in 156 patients with early PD on stable dose of pramipexole immediate release:
In both studies, adverse events observed in patients receiving pramipexole extended release were similar to those seen in previous studies with immediate release pramipexole.
About Parkinson's disease
Parkinson's disease is a progressive neurological disorder that affects nearly one million people in the U.S. It is the second most common chronic neurological disorder in older adults after Alzheimer's. Every nine minutes someone is diagnosed with Parkinson's disease. Symptoms include tremor, muscle rigidity, slowed motion, shuffling gait, and a loss of facial expression. The symptoms vary from individual to individual, but become more severe over time. Although promising research is being conducted, there is currently no cure for Parkinson's disease.
Pramipexole dihydrochloride tablets, in an immediate release formulation, are indicated in the U.S. for the treatment of the signs and symptoms of idiopathic Parkinson's disease (PD) and for moderate-to-severe primary restless legs syndrome (RLS). Pramipexole is supported by more than a decade of real-world experience in the treatment of Parkinson's disease, with more than 10 million prescriptions written in the U.S. since its launch in 1997.
Patients have reported falling asleep without perceived warning signs during activities of daily living, including operation of a motor vehicle, which sometimes resulted in accidents. Hallucinations and postural (orthostatic) hypotension may occur. In clinical trials for early PD using immediate release tablets, the most commonly reported side effects of pramipexole that were more frequent than with placebo are nausea (28% vs. 18%), dizziness (25% vs. 24%), somnolence (22% vs. 9%), insomnia (17% vs. 12%), asthenia (14% vs. 12%), and constipation (14% vs. 6%). In clinical trials for advanced PD, the most commonly reported side effects of pramipexole that were more frequent than with placebo are postural hypotension (53% vs. 48%), dyskinesia (47% vs. 31%), extrapyramidal syndrome (28% vs. 26%), insomnia (27% vs. 22%), dizziness (26% vs. 25%), accidental injury (17% vs. 15%), hallucinations (17% vs. 4%), and dream abnormalities (11% vs. 10%).
Patients and caregivers should be informed that impulse control disorders and compulsive behaviors have been reported in patients taking dopamine agonists, including pramipexole.
A once-daily, extended release formulation of pramipexole dihydrochloride tablets is currently under review by the U.S. Food and Drug Administration for the treatment of the signs and symptoms of idiopathic Parkinson's disease (PD).
Boehringer Ingelheim Pharmaceuticals, Inc.
Boehringer Ingelheim Pharmaceuticals, Inc., based in Ridgefield, CT, is the largest U.S. subsidiary of Boehringer Ingelheim Corporation (Ridgefield, CT) and a member of the Boehringer Ingelheim group of companies.
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 approximately 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 US $17 billion (11.6 billion euro) while spending approximately one-fifth of net sales in its largest business segment, Prescription Medicines, on research and development.
|SOURCE Boehringer Ingelheim Pharmaceuticals, Inc.|
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