The drug milnacipran (to be marketed under the brand name Savella™) received FDA approval as a prescription treatment for symptoms of fibromyalgia (FM) on January 14, 2009 – and reportedly will be available in U.S. pharmacies by March.
Milnacipran – a selective serotonin and norepinephrine dual reuptake inhibitor (SSNRI) developed as an antidepressant – has been tested in multiple trials for ability to demonstrate concurrent improvement in FM pain, physical function, and overall impression of change (global assessment).
Trials Measured “Global” Symptom Status
Generally, more trial subjects taking milnacipran than subjects taking placebo reported “at least a 30% reduction in pain from baseline and also rated themselves as ‘very much improved’ or ‘much improved’ in the global assessment,” according to a release by the drug’s developer, Cypress Bioscience (San Diego), and Forest Labs (New York), which owns the rights to milnacipran in the U.S. and Canada.
Milnacipran “is the only product approved for the management of fibromyalgia that used this complete responder analysis as its primary endpoint,” observes Cypress Bioscience CEO Jay D. Kranzler, MD, PhD.
“The introduction of Savella is important because it is the first drug approved to treat the symptoms of fibromyalgia using a composite responder analysis,” notes fibromyalgia pain specialist and researcher Dr. Daniel Clauw, Professor of Anesthesiology and Medicine (Rheumatology) at the University of Michigan, Ann Arbor.
May Address “Abnormalities in Certain Brain Neurotransmitters”
“Although the exact mechanism by which Savella improves the symptoms of Fibromyalgia is unknown, some researchers believe that abnormalities in certain brain neurotransmitters may be central to fibromyalgia,” the news release states. “Savella blocks the reuptake of both norepinephrine and serotonin, with greater selectivity for the inhibition of norepinephrine reuptake in vitro. This may be the mechanism by which Savella acts to improve the symptoms of fibromyalgia.”
As with all potent drugs, milnacipran is not without potential side effects and contra-indications, as detailed in the Cypress Bioscience/Forest Labs news release under “Important Safety Information.”