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The Motley Fool December 6, 2005 Stephen D. Simpson	Tysabri Tries Again Will the FDA finally approve Elan's multiple sclerosis drug? Investors' fingers are crossed.
The Motley Fool April 21, 2011 Brian Orelli	Tysabri Means Everything to Biogen and Elan ... for Now It's rare to find a drug that affects two companies as much as Tysabri does Biogen Idec and Elan.
The Motley Fool August 26, 2008 Brian Lawler	FDA Changes Course for Elan and Biogen Idec The agency takes a different tack with one of the partnership's top drugs.
The Motley Fool October 26, 2009 Brian Orelli	For Tysabri, 23 Is 10 Too Many The side effect rate is important.
The Motley Fool January 21, 2011 Brian Orelli	Trouble in Tysabri Land? Patient additions for a drug from Biogen Idec and Elan are slowing down.
The Motley Fool January 25, 2010 Brian Orelli	Tysabri Updates: All You Have to Do Is Ask Biogen Idec is willing to hook medical doctors up with an automatic monthly update of the number of progressive multifocal leukoencephalopathy cases for people taking it and Elan's multiple sclerosis drug, Tysabri.
The Motley Fool March 26, 2009 Brian Orelli	R&D Your Way to Higher Sales Biogen is trying to lower side effects to increase sales.
The Motley Fool October 20, 2009 Brian Orelli	All Tysabri, All the Time Biogen needs to focus on its most potential-packed drug.
The Motley Fool February 22, 2011 Brian Orelli	Biogen and Elan's Growing Problem More cases of potentially lethal PML.
The Motley Fool February 10, 2009 Brian Orelli	Elan Needs a Face-Lift Elan is in need of a serious makeover. The company has been beaten down severely, but there's still plenty of beauty in this pharma.
The Motley Fool March 31, 2005 Stephen D. Simpson	Strike Three for Tysabri A third confirmed case of PML all but eliminates Tysabri's potential as a blockbuster drug. For Elan and Biogen investors, the news continues to sting.
The Motley Fool January 16, 2008 Brian Lawler	More Tysabri on the Way Biogen and Elan receive an additional approval for Tysabri. Investors, take note.
The Motley Fool October 27, 2010 Brian Orelli	Biogen Idec's Fight-Back Plan Novartis' Gilenya is coming, but Biogen has a backup plan.
The Motley Fool July 17, 2009 Brian Orelli	Tysabri Is Back! News about Biogen Idec and Elan's multiple sclerosis drug revenues, as well as those of Pfizer and Teva.
The Motley Fool June 30, 2009 Brian Orelli	Here We Go Again With Tysabri The number of patients on Biogen Idec's and Elan's multiple sclerosis drug, Tysabri, that have gotten progressive multifocal leukoencephalopathy since the drug was reintroduced to the market has reached double digits.
The Motley Fool October 1, 2009 Anders Bylund	Why I'm Invested in Tysabri and Elan This Motley Fool analyst has investigated Elan both as an investor and a patient. What's his verdict on the company?
The Motley Fool January 12, 2010 Brian Orelli	Tysabri: It's a Blockbuster! Yawn. So What? Is it really a big deal that Tysabri finally achieved blockbuster status?
The Motley Fool February 2, 2011 Brian Orelli	A Deeper Dive Into Biogen's Revenue Growth On the surface, it looks like Biogen Idec is handling the entrance of Novartis' new oral multiple sclerosis drug, Gilenya, quite well. The real picture is a little bleaker.
The Motley Fool February 28, 2005 Charly Travers	Another Drug Sector Shocker Patient death triggers voluntary withdrawal of MS drug Tysabri. Both BiogenIDEC and Elan have been rocked in trading today, down 41% and 68%, respectively, so far.
The Motley Fool March 1, 2006 Bill Mann	Tysabri: As Bad as AIDS? A report on the Elan/Biogen drug gets blown out of proportion on the eve of an FDA review. To say that a lot rides on the outcome of this meeting for Elan shareholders is an understatement.
The Motley Fool December 19, 2011 Brian Orelli	Elan Turns It Around in 2011 Let's hope next year is as productive.
The Motley Fool July 21, 2010 Brian Orelli	Biogen Looks Good Now, but What About Tomorrow? Biogen Idec saw revenue increase 11% and adjusted earnings per share jump almost 75%, which is all well and good, but the longer-term prospects for the company aren't nearly as impressive.
The Motley Fool February 28, 2008 Brian Lawler	A Tysabri Heart Attack Biogen and Elan announce new warnings for multiple sclerosis drug Tysabri.
The Motley Fool May 26, 2010 Brian Orelli	Blockbuster Drugs Aimed at Busting MS Multiple sclerosis is a large market with more entrants coming.
The Motley Fool April 23, 2009 Brian Orelli	Elan's Strategic Uncertainty Elan has nothing new to report yet on the strategic review that Citigroup is preparing for them.
The Motley Fool February 25, 2010 Brian Orelli	Transplanting Future Revenue Bristol-Myers Squibb waits for experts to decide the fate of its kidney cancer drug.
The Motley Fool October 30, 2008 Brian Orelli	Not What the Doctor Ordered Biogen reports a third case of a deadly brain disorder since their multiple sclerosis drug Tysabri made its return.
The Motley Fool June 8, 2010 Brian Orelli	Injecting Uncertainty Into the Multiple Sclerosis Market Novartis' oral MS drug could be a blockbuster -- if it can get past the FDA.
The Motley Fool February 11, 2010 Brian Orelli	Blockbuster in Hand, It's Time to Show a Profit Elan predicts an operating profit for the first time in nine years.
The Motley Fool November 21, 2007 Brian Lawler	Elan and Biogen Denied Elan's multiple sclerosis treatment is denied a label expansion in Europe. Investors, take note.
The Motley Fool November 24, 2004 Charly Travers	A Blockbuster Drug Gains Approval Biogen IDEC and Elan announced that Tysabri had been approved by the FDA for the treatment of muliple sclerosis (MS). Tysabri has long been regarded as a drug that will generate a whopping level of sales.
Chemistry World February 8, 2013 Andrew Turley	Biogen buys Tysabri from Elan for $3.25bn US biotech Biogen Idec is to pay $3.25 billion to Irish drugmaker Elan for full rights to Tysabri (natalizumab) injections for the treatment of multiple sclerosis.
The Motley Fool March 8, 2005 Charly Travers	After the Crash, Is Biogen IDEC a Buy? Biogen stock plunge may be an overreaction to pulling multiple sclerosis drug Tysabri off the market.
The Motley Fool March 11, 2005 Karl Thiel	Better Times at Biogen IDEC Is now the time to buy this pharmaceutical?
The Motley Fool March 15, 2007 Brian Lawler	Dueling Fools: Elan Bear Rebuttal With so many risks and unknowns embedded in Tysabri, investors should not be convinced Elan can provide a miracle.
The Motley Fool January 2, 2012 Anders Bylund	What Will Elan Do for an Encore? 2011 was a great year for the Irish biotech. Here's how that momentum carries through into 2012.
The Motley Fool February 6, 2009 Brian Orelli	Icahn vs. Biogen: Round 2 On the heels of an announcement that he'll try to get seats on Amylin Pharmaceuticals' board, Icahn is also angling for seats on Biogen Idec's board.
The Motley Fool October 24, 2007 Brian Lawler	Biogen's Brisk Business Following a rumor-filled and busy couple of weeks, Biogen releases its third-quarter financial results.
The Motley Fool July 30, 2007 Brian Lawler	The Good and Bad of Elan Investors, any bet on Elan is primarily a bet on the outcomes of Tysabri and AAB-001.
The Motley Fool March 15, 2010 Brian Orelli	Warning: Not All Boxed Warnings Are Equal Plavix's is mild in comparison.
BusinessWeek March 21, 2005 Catherine Arnst	On The Hot Seat At Biogen How Biogen CEO Jim Mullen managed a drug crisis after alarming news broke that the multiple sclerosis drug Tysabri may cause a deadly brain infection.
The Motley Fool July 23, 2008 Brian Lawler	No Picking at Biogen At a time in which all of its top drugs experienced at least double-digit percentage sales growth, there aren't many issues to poke at with Biogen Idec's just-released second-quarter financial results.
The Motley Fool April 7, 2011 Brian Orelli	When Zombies Attack, Investors Win Novartis is hoping that Prexige has as much success coming back from the dead as Tysabri has.
The Motley Fool December 15, 2009 Brian Orelli	Forget the Higher Doses Elan has to drop the highest dose of an Alzheimer's drug. Again.
The Motley Fool April 24, 2009 Brian Orelli	Great Drugs Not Living Up to Their Potential How well a drug works is not the most important thing to consider when investing. Drugs that work don't always become blockbusters.
The Motley Fool March 15, 2007 Anders Bylund	Dueling Fools: Elan Bull Rebuttal Do your due diligence and place your free bets on that Alzheimer's treatment or nano drug delivery system today. Tysabri simply isn't the massive risk some have made it out to be.
The Motley Fool August 10, 2005 Jack Uldrich	Does NanoCrystal Ball See All? There is promise in biotech Elan, but not for the reason you might think. Investors, take note.
The Motley Fool April 12, 2011 Brian Orelli	How Significant Is 'Statistically Significant' for Biogen? Biogen could have a third multiple sclerosis blockbuster on its hands.
The Motley Fool October 5, 2006 Brian Lawler	Elan Extends Tysabri's Reach The MS-fighting drug gains approval in Canada. Next month, when Biogen and Elan report third-quarter results, investors will get a preliminary indication of how these sales of Tysabri are ramping up.
The Motley Fool June 30, 2010 Brian Orelli	Which Midsized Biotech Is the Best Buy? Biogen Idec, Amgen, or Gilead? Which of these biotechs has the most potential for growth?