Not all product defects involve broken parts or flawed designs. In many cases, a product is dangerous because it lacks adequate warnings or instructions. CACI No. 1205 explains how California juries evaluate strict liability claims based on a manufacturer’s failure to warn consumers—or physicians—about known or knowable risks.
What Is CACI No. 1205?
CACI No. 1205 applies when a plaintiff claims a product was defective because it did not include sufficient warnings or instructions about potential risks, side effects, or allergic reactions. The focus is not on how the product was designed or manufactured, but on whether users were properly informed of dangers they could not reasonably be expected to recognize on their own.
This instruction is a core component of California strict products liability law.
Full Text of CACI No. 1205
CACI No. 1205. Strict Liability – Failure to Warn – Essential Factual Elements
[Name of plaintiff] claims that the [product] lacked sufficient [instructions] [or] [warning of potential [risks/side effects/allergic reactions]]. To establish this claim, [name of plaintiff] must prove all of the following:
- That [name of defendant] [manufactured/distributed/sold] the [product];
- That the [product] had potential [risks/side effects/allergic reactions] that were [known/ [or] knowable in light of the [scientific/ [and] medical] knowledge that was generally accepted in the scientific community] at the time of [manufacture/distribution/sale];
- That the potential [risks/side effects/allergic reactions] presented a substantial danger when the [product] is used or misused in an intended or reasonably foreseeable way;
- That ordinary consumers would not have recognized the potential [risks/side effects/allergic reactions];
- That [name of defendant] failed to adequately warn [or instruct] of the potential [risks/side effects/allergic reactions];
- That [name of plaintiff] was harmed; and
- That the lack of sufficient [instructions] [or] [warnings] was a substantial factor in causing [name of plaintiff]’s harm.
[The warning must be given to the prescribing physician and must include the potential risks, side effects, or allergic reactions that may follow the foreseeable use of the product. [Name of defendant] had a continuing duty to warn physicians as long as the product was in use.]
New September 2003; Revised April 2009, December 2009, June 2011, December 2011, May 2020
How Juries Evaluate Failure-to-Warn Claims
Under CACI 1205, jurors focus on whether:
- The risk was known or scientifically knowable at the relevant time
- The risk posed a substantial danger during foreseeable use or misuse
- Ordinary consumers would not recognize the danger without a warning
- The warning or instruction was missing, inadequate, or incomplete
- The lack of warning was a substantial factor in causing harm
For prescription products, warnings are directed to the prescribing physician, and manufacturers have a continuing duty to warn as new risks become known.
Illustrative Example
A medication carries a known risk of severe allergic reaction, but the warning label fails to disclose that risk. If a patient suffers that reaction after foreseeable use, a jury may find the manufacturer strictly liable under CACI 1205 for failing to provide adequate warnings.
Practical Considerations in Failure-to-Warn Cases
These cases often depend on:
- Scientific and medical literature available at the time of sale
- Internal safety reviews and adverse event reports
- The adequacy, clarity, and placement of warnings
- Whether updated warnings were issued as new risks emerged
Discovery frequently focuses on what the manufacturer knew—and when.
Speak With a Product Liability Lawyer
If you were injured by a product that failed to warn of known or knowable dangers, you may have a strict liability claim under CACI No. 1205. WIN Injury & Accident Trial Lawyers can evaluate your case and explain your legal options.
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