Why Omeros Stock Is Tanking

 Shares of Omeros (NASDAQ:OMER), a biopharmaceutical company, are falling today after the company made a disclosure regarding narsoplimab, an experimental treatment to address side effects of stem cell transplants. Shares of the biotech were down 43.7% as of 11:25 a.m. EDT on Friday.

Omeros has just one revenue stream at the moment, Omidria, an expensive eye-drop solution that gets added to the bill when Medicare patients go under the knife for lens replacements and cataract removals. Omidria is convenient but hardly necessary for these procedures.

That's why investors are eager to see the company launch narsoplimab, an experimental treatment for thrombotic microangiopathy caused by hematopoietic stem cell transplants, or HSCT-TMA. The Food and Drug Administration has been reviewing an application from Omeros since January and was expected to issue a decision later this month.

Omeros stock is sinking today because the company told investors the FDA identified deficiencies that prevent the agency from taking the next step toward approving narsoplimab. This could be a minor case that isn't related to the drug candidate itself, but investors aren't taking any chances.

The FDA most likely asked Omeros to run another trial. The company submitted a biologics license application based on data from an open-label study that enrolled 28 adult HSCT-TMA patients.

Omeros could have included a control group in its attempt to prove narsoplimab was truly effective at treating HSCT-TMA but chose not to. That was a red flag that investors probably should have spotted a mile away. It was three years ago today that Omeros posted results from narsoplimab's first placebo-controlled study, and it was a total dud. 

Investors will want to watch this company from a safe distance until we see one of its experimental drugs achieve unequivocal success in a well-controlled study.

https://www.fool.com/investing/2021/10/01/heres-why-omeros-is-tanking-today/