Elan
Elan Corporation plc (Template:Nyse, Template:Lse) is a major drugs firm based in Athlone, County Westmeath, Ireland which has major interests in the United States. In the late 1990's its value on the Irish Stock Exchange reached over 20bn. It has secondary listings on the London Stock Exchange and the New York Stock Exchange. It was one of Ireland's major business success stories. However in the early years of 2000's an accounting scandal and investor reactions to the global slump, caused a major devaluation resulting in a share price slump of over 90%. Since then the company has regained its growth path under the reign of a new American CEO Kelly Martin. Elan employs over 2,000 people worldwide. It is listed on the New York Stock Exchange as ELN, the Irish Stock Exchange as ELN.I, and the London Stock Exchange as ELN.L. Reformulations for client-based projects has contributed to more than $9 billion in in-market sales for these clients. Currently more than 2.5 million patients take Elan's products worldwide.

# Products in development
In neurology, Elan is focused on building upon its breakthrough research and extensive experience in the area of neuropathology-related disorders such as Alzheimers disease, where the companys efforts include programs focused on small molecule inhibitors of beta secretase and gamma secretase, enzymes whose actions are thought to affect the accumulation of the amyloid plaques found in the brains of patients with Alzheimers disease. Elan is also studying other neurodegenerative diseases, such as Parkinson's disease. Elan, in collaboration with Wyeth, initiated a Phase II clinical trial for an experimental humanized monoclonal antibody with a targeted indication of immunotherapeutic treatment of mild to moderate Alzheimers disease. The humanized monoclonal antibody is designed and engineered to clear the neurotoxic beta-amyloid peptide that accumulates in the brains of patients with Alzheimers disease. Elan is hopeful that its drug "aab-001" (now known as bapineuzumab) is doing well in trials as the first results are due in 2006.
In autoimmune diseases, Elans primary emphasis is studying cell trafficking to discover ways to provide disease-modifying therapies for autoimmune diseases such as rheumatoid arthritis, multiple sclerosis and inflammatory bowel disease. Research efforts are also focused on physiological and neuropathic pain.

## Natalizumab/Tysabri
Previously named Antegren, Natalizumab is a drug co-marketed by Biogen Idec and Elan as "Tysabri". Tysabri is a monoclonal antibody that inhibits immune cells from crossing blood vessel walls to reach various tissues, including the brain. It has proven efficacy in the treatment of two serious autoimmune disorders: multiple sclerosis, and Crohn's disease. In multiple sclerosis, Tysabri was shown to reduce relapses by 67% vs. a placebo in double-blind studies. It slowed the progression of disability by 42%. While it is impossible to compare results across different clinical trials, the older generation drugs, i.e. interferons and Copaxone, are generally acknowledged as demonstrating about a 30-35% decrease in relapse rate vs. placebo; and only two drugs have been shown to decrease the progression of disability, but again only by around 20-40%.

## NanoCrystal Technology
For poorly water soluble compounds, Elan's proprietary NanoCrystal technology can enable formulation and improve compound activity and final product characteristics. The NanoCrystal technology can be incorporated into all dosage forms both parenteral and oral, including solid, liquid, fast-melt, pulsed release and controlled release dosage forms.

# Drugs
Products and drugs that Elan has developed include:
- Avinza  once-daily, novel dual release morphine sulphate
- Emend  oral table form of aprepitant, a poorly water soluble compound
- Focalin XR  once-daily dexmethylphenidate marketed in US and other territories
- Herbesser R  once-daily, high-potency, sustained release diltiazem for Japanese and other Asian markets
- Megace ES  concentrated oral suspension utilizing NanoCrystal Technology, marketed in the U.S.
- NaprElan - once-daily, sustained-release naproxen sodium
- Rapamune - oral tablet form of poorly water soluble compound
- Ritalin LA  once-daily, pulsatile release of methylphenidate
- Theo-Dur - twice-daily, sustained-release theophylline
- TriCor - new formulation of Abbotts fenofibrate, which can be taken without regard to food, launched in the U.S.
- VerElan - once-daily, sustained-release verapamil
- VerElan PM  modified release, chronotherapeutic verapamil