The Revolutionary Multiple Sclerosis Drug You've Never Heard Of

Image source: Roche.

A bunch of new, expensive, and incrementally better multiple sclerosis therapies approved over the past decade sent global spending on such drugs skyrocketing to nearly $20 billion last year.

Those of you that understand this awful disease will be glad to learnRoche has a drug on deck that could send all those rookies back to the minor leagues.

No two multiple sclerosis patients are the same, and despite the recent plethora of options, neurologists still face an awful dilemma. They must decide if a patient's disease is serious enough to warrant treatment with a drug that's highly effective, but potentially fatal.

Or, physicians could prescribe a wonderfully safe drug that might not stop their disease from progressing. Needless to say, it's not a decision taken lightly.

A hint of what lies ahead for RocheTecfidera from Biogen seemed like the solution to this horrid dichotomy. This led to outstanding global sales of $2.9 billion in its first full-year post-approval.

Sadly, the pill has since been associated with several cases of a deadly brain infection (PML) more common among the highly effective therapies.The subsequent warning added to Tecfidera's label means demand for a highly effective therapy that's safe-as-milk stronger than ever.

After looking over some largely ignored data recently presented at a conference for nerds, I think Roche's Ocrevus is poised to revolutionize treatment of the neurodegenerative disease. I wouldn't be surprised if it's one of the most successful drug launches of 2017, if approved, and able to maintain a stellar safety profile.

First-in-classOcrevus is the first multiple sclerosis drug to specifically target immune cells in the CD20 positive stage.

Today's immunology lesson image source: Roche.

By targeting this type of cell, investigators believe they can effectively slow progression of the disease, while leaving the immune system capable of fighting off the opportunistic infections that make today's most effective multiple sclerosis drugs the most dangerous.

Also first in primary progressive multiple sclerosisIt's also the first drugever to show efficacy in the 10% to 15% of patients with a form of the disease that continually worsens, known as primary progressive multiple sclerosis.

During the study that will support Ocrevus' application in this group of patients, the candidate reached its main goal, reducing the risk of disability progression by 24% and 25%, at 12- and 24-weeks, respectively. Even more encouraging was the highly significant reduction in brain lesions measured by MRI scans (I won't bore you with the figures, but they're pretty good -- and if you're curious, you can find them here).

Good news for the majorityIt appears Ocrevus is also effective in the majority of multiple sclerosis patients described as relapsing or remitting. During studies that could lead to an approval for this group, patients receiving Ocrevus showed a 47% reduction in their annualized relapse rate compared to the standard-of-care, a once popular drug from Merck KGAA (the German Merck)called Rebif.

Image source: Roche.

To give you a clue of just how amazing that is: Tysabri (another Biogen drug) and Tecfidera showed 67% and 53% reductions in annualized relapse rates, respectively, againstplacebos.

I can't tell you how 47% "better" than Rebif compares to 67% "better" than nothing, but it's surelyan incredible improvement. We can't draw concrete comparisons without head-to-head trials, but you should know Tysabri is one of the drugs so strongly associated with deadly brain infections, it's reserved for severely relapsing patients.

While brain infections associated with Tecfidera didn't surface until after its approval, they occurred in three patients who receivedTysabri in clinical trials.

As for Ocrevus, there haven't been any brain infections, and the drug appears generally well tolerated. Best of all, it only needs to be administered by intravenous infusion about twice a year.

What's next for OcrevusRoche intends to file applications for both relapsing remitting and primary progressive multiple sclerosis in the U.S. and EU in the first half of the year. Nothing is certain, but my guess is the drug will become available for relapsing remitting patients in the first half of 2017.

Image source: Roche.

The FDA recently granted Ocrevus a Breakthrough Therapy Designation in primary progressive multiple sclerosis. The agency reserves this designation for drugs that show potential to significantly improve outcomes compared to what's available, which in this case is practically nothing.

The designation is intended to speed an application along in a quick, yet prudent fashion, and I think Ocrevus could earn an FDA approval for primary progressive multiple sclerosis by the end of this year.

If my predictions for the relapsing remitting indication play out, practically every drugmaker with multiple sclerosis products will feel some pressure from Ocrevus by the end of next year.

Don't cry for BiogenRoche and Biogen began a partnership over 20 years ago with a CD20 targeting blood cancer therapy first approved in 1997, called Rituxan.Back then, Biogen didn't have the means to develop these drugs itself, and it let Roche do the heavy lifting in return for a share of sales.

Last year, Biogen's share was over $1.3 billion,nearly all of which filters straight to its bottom line.

While Biogen's multiple sclerosis product sales will get slapped hard by Ocrevus, if approved, tiered royalties between 13.5% and 24% on U.S. net sales of the drug ought to take some of the sting out.

As for the Swiss pharma giant, it has quite a few underappreciated drugs in late-stage development that put it on my list of cheap-looking healthcare stocks. With a bit of luck they should more than to offset losses from its stable of aging blockbusters.

The article The Revolutionary Multiple Sclerosis Drug You've Never Heard Of originally appeared on Fool.com.

Cory Renauer has no position in any stocks mentioned. Like this article? Follow Cory on Twitter @coryrenauer. The Motley Fool recommends Biogen. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.