Osmotica Pharmaceuticals has submitted an amended new drug application (NDA) to the U.S. Food and Drug Administration (FDA) requesting the approval of arbaclofen extended release (ER) tablets for the treatment of spasticity in people with multiple sclerosis (MS).
Arbaclofen ER (brand name Ontinua), is an extended release formulation of arbaclofen, a compound similar to the muscle relaxant baclofen that is approved to alleviate spasticity (muscle stiffness) in people with MS, spinal cord injuries, or other type of disorders involving the spinal cord.
The therapy is based on Osmotica’s proprietary Osmodex drug delivery technology, which allows the production of tablets containing one or more ingredients for immediate, controlled, delayed, or extended release.
This extended release formulation of arbaclofen releases the medication’s active ingredient gradually over longer periods of time, potentially allowing for less-frequent dosing and likely reducing the risk of side effects.
“We are excited to have resubmitted our NDA for arbaclofen ER, our novel treatment, using the Osmodex technology, for MS spasticity,” Brian Markison, CEO of Osmotica Pharmaceuticals, said in a press release.
The company’s NDA resubmission was supported by data from two trials — the Phase 3 OS440-3004 study (NCT03290131) and its open-label, long-term extension OS440-3005 (NCT03319732) — that are both part of arbaclofen ER’s clinical developmental program, one of the largest programs focused on MS spasticity.
During OS440-3004, MS patients with spasticity were assigned randomly to receive one of two doses (40 or 80 mg) of arbaclofen ER tablets, or a placebo, twice daily for three months.
After completing this study, patients had the option to enroll in OS440-3005 and continue treatment with arbaclofen ER — administered at the highest tolerated dose (up to 80 mg daily) — for up to one year. Patients who were not in the Phase 3 trial also could enroll in this open-label extension trial.
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