FDA APPROVES NEW ADD-ON DRUG TO TREAT OFF EPISODES IN ADULTS WITH PARKINSON’S DISEASE
Istradefylline (Nourianz, Kyowa Kirin) tablets have
been approved by the US Food and Drug Administration (FDA) as add-on treatment
to levodopa/carbidopa in adults who have Parkinson’s disease (PD) experiencing
“off” episodes.
Eric Bastings, M.D., acting director of the
Division of Neurology Products in the FDA’s Centre for Drug Evaluation and
Research said “Parkinson’s disease is a debilitating condition that
profoundly impacts patients’ lives.”
Istradefylline is a selective adenosine A2A
receptor antagonist. When treated on ‘off’ episodes in patients with PD taking
levodopa/carbidopa its effectiveness was shown in four 12-week,
placebo-controlled clinical studies that included a total of 1143 participants.
According to all the four studies, it reports that
the addition of istradefylline leads to a statistically significant decrease
from baseline in daily “off” time relative to placebo add-on, the FDA stated in
a news release.
Dyskinesia, dizziness, constipation, nausea,
hallucination, and insomnia were the most common adverse reactions observed in
patients who consumed istradefylline. Patients should be monitored for the
development of dyskinesia or exacerbation of existing dyskinesia. The FDA
advises considering reducing the dose or stopping the drug usage if
hallucinations, psychotic behaviour, or impulsive/compulsive behaviour occurs.
PD
is the second most common neurodegenerative disorder in the United States after
Alzheimer’s disease according to the National Institutes of Health. 50,000
Americans are estimated to be diagnosed with PD each year, and about 1 million
Americans have the condition.
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