(Colo. 1986), overruled on other grounds, Armentrout v. FMC Corp., 842 P.2d 175 (Colo. 1992); Feldman v. Lederle Laboratories, 97 N.J. 429, 479 A.2d 374 (1984); Belle Bonfils Memorial Blood Bank v. Hansen, 665 P.2d 118 (Colo. 1983) (superseded by statute in regard to blood banks, as recognized in United Blood Services v. Quintana, 827 P.2d 509 (Colo. 1992). A few courts have not specifically adopted comment k. and have instead either fashioned their own rules or treated prescription drugs in the same manner as that of all other products. See, e.g., Shanks v. Upjohn Co., 835 P.2d 1189 (Alaska 1992); Collins v. Eli Lilly Co., 116 Wis. 2d 166, 342 N.W.2d 37 (1984); Thomas V. Van Flein, Prospective Application of the Restatement (Third) of Torts: Products Liability in Alaska, 17 Alaska L. Rev. 1 (2000) (citing cases).
Although a variety of tests are employed among jurisdictions that apply comment k. on a case-by-case basis, the majority apply the comment as an affirmative defense, with the trend toward the use of a risk-utility test in order to determine whether the defense applies. See Annot., 96 A.L.R.3d 22 (1979). See, e.g., Tansy v. Dacomed Corp., 890 P.2d 881 (Okla. 1994); Castrignano, supra; Toner, supra; Belle Bonfils Memorial Blood Bank, supra. When a risk-utility test is applied, the existence of a reasonable alternative design is generally the central factor. See, e.g., Tansy, supra; Toner, supra; Belle Bonfils Memorial Blood Bank, supra. Because the application of comment k. is traditionally viewed as an exception and a defense to strict liability, courts generally place the initial burden of proving the various risk utility factors on the defendant. See, e.g., Tansy, supra; Belle Bonfils Memorial Blood Bank, supra. Thus, under these cases, the plaintiff’s burden of proof for his or her prima facie case remains the same as it is in any products liability case in the given jurisdiction.
At the time McDaniel v. McNeil Laboratories, Inc., 196 Neb. 190, 241 N.W.2d 822 (1976), was decided, it reflected a minority view. Since that time, a clear majority of courts have decided on a case-by-case basis, through the application of a comment k. defense, the issue of liability of a manufacturer for a design defect in a prescription drug. On further reflection, we conclude that the rule of law expressed in McDaniel has not