The president of the Type 1 Diabetes Defense Foundation got permission to break off from a proposed class action accusing U.S. drugmakers of colluding to fix insulin prices.

A federal judge Nov. 7 unconsolidated Julia Boss’s lawsuit against leading pharmacy benefit managers and drugmakers from a sprawling proposed class action raising 60 claims against pharmaceutical giants Novo Nordisk Inc., Eli Lilly & Co., and Sanofi-Aventis U.S. LLC. Boss, who is suing in her personal capacity, objected to how her attorneys...