If you like the thrills of make-or-break biotech investing, watch for the Oct. 14 Food and Drug Administration advisory committee's review of a multiple sclerosis drug from Acorda Therapeutics (Nasdaq: ACOR).

Unlike other drugs on the market, Acorda isn't claiming that its drug, Amaya, modifies the disease. Amaya's goal is to improve the MS patient's walking ability. Also, unlike existing drugs, Amaya is a sustained-release tablet.

Several companies,including Novartis (NYSE: NVS) and the Germandrug/chemical conglomerate Merck KGaA , are developing oral MS treatments. Assuming they are as effective and safe as existing products, they would provide greater convenience than injectable or infused drugs such as Avonex from Biogen Idec (Nasdaq: BIIB), Copaxone from Teva Pharmaceutical Industries (Nasdaq: TEVA) and Tysabri from Biogen Idec and Elan (NYSE: ELN).

The advisory panel's review of Amaya should provide these companies -- and investors -- with insight about key issues facing oral MS drugs. And Amaya could be a big hit. A recent report by Merriman Curhan Ford says a best-case scenario could yield peak annual sales of $1 billion in 2015.

A nail-biter
Acorda needs Amaya. The company sells only one drug -- Zanaflex for the management of spasticity, which provided modest sales of $29.4 million for the first half of 2009. Aside from Amaya, there’s nothing in the R&D pipeline sufficiently advanced for investors to use to make an investment decision.

As for the advisory-panel vote, the FDA doesn't have to follow the recommendations of its outside advisors, but it usually does.

For Amaya, the agency's PDUFA date -- the timetable for making a decision -- occurs eight days after the advisory panel meets.  For a first-in-class drug like Amaya, there's a good chance the FDA will require more time.

It's also possible Acorda will have to institute a risk evaluation and mitigation strategies ( REMS) program, an increasingly frequent FDA requirement to ensure certain drugs are taken and administered safely.

Sharing revenues, expanding markets
If the FDA approves Amaya, which also is called fampridine-SR, Acorda will have to share its success with Elan, which manufactures the drug for Acorda. Continued...