When a defective or dangerous product causes a serious injury, the physical recovery process is only one part of the challenge. Many people are surprised to learn that the manufacturer, distributor, or their insurance company will often respond by claiming the injured person “misused” the product. This argument is one of the most common defense strategies in product liability cases. Understanding how it works, and how California law actually treats it, can make a meaningful difference in whether you recover the compensation you need.
At Biren Law Group, we regularly represent people who have suffered catastrophic injuries from defective products. We know how aggressively these claims are defended. The “misuse” argument is rarely about the full truth of what happened. It is a calculated effort to shift blame, reduce accountability, and limit what the company has to pay.
What the Defense Means by “Product Misuse”
In a product liability case, the injured person generally does not need to prove the manufacturer was careless in the ordinary sense. California law allows recovery under strict liability when a product is defectively designed, manufactured, or lacks adequate warnings, and that defect causes harm while the product is used in an intended or reasonably foreseeable way.
The defense of product misuse attempts to break that chain. The manufacturer or seller argues that the way you used the product was so improper or unexpected that the company should not be held responsible. Examples they raise include using the product for a purpose other than its primary intended use, ignoring instructions or warnings, or modifying the product after purchase.
On its face, the argument can sound reasonable. In practice, it is often overstated. Manufacturers design and market products knowing that people do not always use them in the ideal, laboratory-perfect manner. California law recognizes this reality.
How California Law Actually Treats Product Misuse
Under California law, product misuse is not an automatic bar to recovery. For the defense to completely eliminate liability in a strict products liability case, the defendant must prove two things:
- The product was misused or modified after it left the defendant’s control; and
- The misuse or modification was so highly extraordinary that it was not reasonably foreseeable, and that unforeseeable use was the sole cause of the injury.
This standard comes from California jury instructions (CACI No. 1245) and longstanding case law. Courts have made clear that manufacturers must anticipate some degree of misuse and abuse. They are expected to design products and provide warnings that account for reasonably foreseeable ways people will actually use (or even slightly misuse) the product.
If the claimed misuse was foreseeable, or if it was only one contributing factor rather than the sole cause of the harm, the defense does not wipe out the claim. Comparative fault principles may still apply, which means any recovery could be reduced by the percentage of responsibility assigned to the injured person. But a reduction is very different from a complete denial of compensation.
In short: the defense cannot simply say “you used it wrong” and walk away. They carry the burden of proving that the use was highly extraordinary and unforeseeable.
Why Manufacturers Rely on This Defense
Product liability cases involving serious injuries such as brain injuries, spinal cord damage, severe burns, traumatic amputations, or other life-altering harm carry substantial potential value.
Manufacturers and their insurers know this. Asserting misuse is a way to:
- Reframe the narrative so the injured person appears primarily at fault
- Create doubt in the minds of adjusters, mediators, or jurors
- Pressure the injured person into accepting a lower settlement
- Avoid a full examination of design flaws, manufacturing defects, or inadequate warnings
These arguments are often raised early, sometimes before the company has even fully investigated the product itself. They can feel personal and demoralizing to someone already dealing with medical treatment, lost income, and uncertainty about the future.
How Experienced Counsel Counters the Misuse Claim
A strong response to a product misuse defense requires thorough investigation and technical analysis.
Key steps typically include:
- Preserving and examining the product. The physical evidence is often critical. Early steps to secure the product (or its remains) and prevent spoliation are essential.
- Analyzing warnings, instructions, and marketing materials. What did the company actually tell users? Were the warnings clear, conspicuous, and adequate for the risks?
- Retaining qualified experts. Engineers, human-factors specialists, and other technical experts evaluate whether the claimed use was reasonably foreseeable and whether safer design alternatives existed.
- Establishing the true cause of the injury. Even if some aspect of the use was imperfect, the underlying defect may still be a substantial factor in causing the harm.
- Documenting the full impact of the injury. Catastrophic injuries create complex damages involving future medical care, loss of earning capacity, and diminished quality of life. A complete damages picture strengthens the overall case.
At Biren Law Group, our approach to these cases is grounded in decades of experience handling serious and catastrophic injury claims, including product liability matters. We bring in the necessary experts, leave no relevant evidence unexamined, and prepare every case as if it will go to trial. That preparation often changes the dynamics of settlement discussions.
What You Should Do If You Have Been Injured
If a product caused your injury and you are now facing claims that you misused it:
- Seek appropriate medical care and follow through with treatment.
- Preserve the product and any related packaging, instructions, or receipts if it is safe to do so. Do not discard or alter it.
- Document everything you can about how the product was used and what happened.
- Avoid giving detailed recorded statements to the manufacturer’s representatives or insurers without legal advice.
- Consult an attorney experienced in product liability and catastrophic injury cases as soon as possible. Early investigation can protect critical evidence and prevent the defense narrative from taking root unchallenged.
Taking the Next Step
Being injured by a product you trusted is difficult enough. Having the company turn around and claim the injury is somehow your fault adds an unnecessary and unfair burden. California law does not allow manufacturers to escape responsibility simply by pointing to foreseeable uses or imperfect real-world behavior.
If you or a family member has suffered a serious injury involving a potentially defective product, we invite you to contact Biren Law Group for a free, confidential consultation. We will review the facts of your situation, explain how the law applies, and discuss the options available to pursue full and fair compensation. There is no fee unless we recover money for you.
You do not have to accept the defense’s version of events as the final word. With the right representation, the focus can be returned to where it belongs: the safety of the product and the harm it caused.