Biogen Idec (Nasdaq: BIIB) Stock Gains on FDA Approval of New MS Drug

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Biogen Idec Inc. (Nasdaq: BIIB) stock was up 1.6% this morning following news that the company's multiple sclerosis (MS) drug Plegridy was approved by the U.S. Food and Drug Administration on Friday.

Plegridy is marketed as a longer lasting multiple sclerosis injectable designed for patients with relapsing remitting MS. Last month, the drug received approval by the European Commission for use in 28 countries in Europe.

BIIB stock soared nearly 12% the day it received European approval. Overall, BIIB is up more than 14% in the last month.

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More than 400,000 Americans and 2.3 million people worldwide are affected with multiple sclerosis. MS is an autoimmune disease that affects the patient's central nervous system. The disease inhibits communication between the brain and different parts of the body, which can lead to a decline in many physical functions.

"As a proposition for patients, it's a very attractive compound," Biogen's Vice President of Multiple Sclerosis Research and Development Gilmore N. O'Neill told The Boston Globe. "It gives patients another choice."

Biogen already has several other multiple sclerosis treatments in its product portfolio, including Avonex, an injectable similar to Plegridy.

Plegridy uses the same active ingredient – interferon beta – as Avonex, however it is injected less frequently. Avonex requires once-a-week injections, while Plegridy is injected every two weeks. Another advantage for Plegridy is that it can be administered with a prefilled auto-injector.

Approximately 50% of patients suffering from MS are prescribed an interferon beta product.

The company has stated that Plegridy will have a similar price to Avonex, which costs just over $59,000 annually.

Biogen Idec
NASDAQ: BIIB
Nov 21
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Price: 303.55 | Ch: 4.45 (1.5%)

Biogen officials have stated that they plan to transition many of their Avonex patients over to Plegridy, which will naturally cut into Avonex's sales. However, the company believes that patients who use competing interferon injectables will switch to Biogen's newest product.

Some interferon treatments require multiple injections per week, which makes Plegridy's less frequent injections attractive.

According to The Boston Globe, Biogen has not yet estimated the size of the market for Plegridy. But given the fact that interferon-based drugs are prescribed to roughly half of MS patients (2.3 million worldwide), the market should be large.

Especially when the drug is significantly cutting down on the number of injections a patient receives.

For investors, the fact that Plegridy received FDA approval today is a major win, and should push the stock higher. But that isn't the only reason to be bullish on BIIB stock…

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