Mealey's (March 16, 2016, 11:22 AM EDT) -- PHILADELPHIA — A marketing expert will be allowed to testify about the effect on consumers of the marketing of Extra Strength Tylenol, a Pennsylvania federal judge presiding over the Tylenol multidistrict litigation ruled March 2 (In Re: Tylenol [Acetaminophen] Marketing, Sales Practices and Products Liability Litigation, MDL Docket No. 2436, No. 13-md-2436, Rana Terry, et al. v. McNeil-PPC, Inc., et al., No. 12-7263, E.D. Pa.; 2016 U.S. Dist. LEXIS 26603)....