The Pennsylvania Supreme Court held that expert testimony, in accordance with the Frye rule, must be generally accepted in the relevant scientific field to be considered as evidence, and that the federal practice of including expert testimony under more relaxed principals would not be followed in Pennsylvania courts.
Blum v. Merrell Dow Pharmaceuticals, Inc., 764 A.2d 1 (Pa. 2000)
Frye Remains the Standard for Determining the Admissibility of Expert Testimony in Pennsylvania Courts: Blum v. Merrell Dow Pharmaceuticals, Inc.,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol40/iss2/9