What is the test for an implied warranty of fitness for a particular purpose?

"An implied warranty of fitness for a particular purpose arises only where (1) the purchaser at the time of contracting intends to use the goods for a particular purpose, (2) the seller at the time of contracting has reason to know of this particular purpose, (3) the buyer relies on the seller's skill or judgment to select or furnish goods suitable for the particular purpose, and (4) the seller at the time of contracting has reason to know that the buyer is relying on such skill and judgment." Keith v. Buchanan, 173 Cal.App.3d 13, 25, 220 Cal.Rptr. 392 (1985). Reliance by the plaintiff upon the skill and judgment of the defendant to select a product that is suitable for the plaintiff's needs is the "major question" for an implied warranty of fitness claim. Id. However, in a context of prescription drugs, "a patient's expectations regarding the effects of a prescription drug are those related to him by his physician, to whom the manufacturer directs the warnings regarding the drug's properties." Carlin, 13 Cal.4th at 1118, 56 Cal.Rptr.2d 162, 920 P.2d 1347 (quoting

[367 F.Supp.3d 1165]