Shire’s March 2012 decision to walk away from the chance to market its drug Replagal in the US and put it in direct competition with Sanofi’s Fabrazyme is now being pilloried as a possible conspiracy between the two drugmakers, as opposed to Shire’s disinterest in investing in more research for an FDA approval. Both drugs treat the rare condition Fabry disease, in which a specific type of fat accumulates in the cells and can cause kidney and heart disease, among other problems.

The Wall Street Journal reports that a consumer advocacy group alleges that Shire decided to give Sanofi the US market if it would be allowed to sell its drug in Europe, and is asking the Federal Trade Commission to give the situation a once-over.