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Sr. Executive / Executive, Production; THE IBN SINA PHARMACEUTICAL IND LTD

 
Approval of Potiga (ezogabine) by FDA
Brand Name: Potiga
Generic Name: ezogabine
Company Name: GlaxoSmithKline and Valeant Pharmaceuticals International
Date of Approval: June 10, 2011
Treatmant for: Seizures
Valeant Pharmaceuticals International, Inc. and GlaxoSmithKline announced today that the U.S. Food and Drug Administration (FDA) has approved Potiga (ezogabine) Tablets, a potassium channel opener, as adjunctive treatment of partial-onset seizures in patients aged 18 years and older.

"We are so pleased to reach such an important milestone with the U.S. approval of Potiga by the FDA," stated Susan Hall, PhD, head of research and development at Valeant. "We believe this product will play a needed role in the management of partial onset seizures in appropriate patients who are uncontrolled on their current medications."

FDA has recommended that ezogabine be scheduled as a controlled substance under the Controlled Substances Act (CSA). Final classification is still under review by the Federal Drug Enforcement Administration (DEA) and ezogabine will not be available until this process is complete.

Ezogabine is expected to be available in U.S. pharmacies by the end of the year. Full Prescribing Information and a Medication Guide will be available at www.gsk.com once scheduling is complete.

The efficacy of ezogabine as adjunctive therapy in partial onset seizures was established in 3 controlled clinical studies involving 1,239 adult patients. The primary endpoint was percent change in seizure frequency from baseline in the double-blind treatment phase.

FDA has determined that a Risk Evaluation and Mitigation Strategy (REMS) will be necessary for ezogabine, with the goal of informing healthcare professionals of the risk of urinary retention and the symptoms of acute urinary retention. Ezogabine caused urinary retention in clinical trials. Urinary retention was reported as an adverse event in 29 out of 1,365 (approximately 2%) patients treated with ezogabine. In all studies of patients with partial-onset seizures, including open-label studies, five patients required catheterization (four on ezogabine and one on placebo).

In 3 controlled clinical studies, 25% of patients receiving ezogabine (199/813) and 11% of patients receiving placebo (45/427) discontinued treatment because of treatment-emergent adverse reactions.

The most frequently reported adverse reactions in patients receiving ezogabine vs placebo (greater than or equal to 4% and occurring approximately twice the placebo rate) were dizziness (23% vs 9%), somnolence (22% vs 12%), fatigue (15% vs 6%), confusional state (9% vs 3%), vertigo (8% vs 2%), tremor (8% vs 3%), abnormal coordination (7% vs 3%), diplopia (7% vs 2%), disturbance in attention (6% vs <1%), memory impairment (6% vs 3%), asthenia (5% vs 2%), blurred vision (5% vs 2%), gait disturbance (4% vs 1%), aphasia (4% vs <1%), dysarthria (4% vs <1%), and balance disorder (4% vs <1%).

Outside of the U.S., ezogabine is known as retigabine (brand name Trobalt), and received marketing authorization in the European Union (EU) on March 28th 2011.

GlaxoSmithKline - one of the world's leading research-based pharmaceutical and healthcare companies - is committed to improving the quality of human life by enabling people to do more, feel better and live longer. For further information please visit www.gsk.com
Note: To know more please go to the following sources.
Update: 2011-06-13
Source: Drugs.com & FDA
 
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