What happened
A prescription drug caused a serious injury
Every medication carries risk, and an adverse effect that was properly disclosed is generally not a legal claim — it's a known risk that you and your prescriber accepted. What can be a claim is a risk the manufacturer knew about and failed to adequately warn about, or a drug whose dangers outweighed its benefits as designed.
Whether that's viable for you depends heavily on two things you can check today.
Published July 27, 2026 · Last reviewed July 30, 2026
First: brand or generic
Generic manufacturers must use the same label as the brand drug, so under PLIVA v. Mensing they generally cannot be sued for inadequate warnings. Brand manufacturers face no such bar. Your pharmacy dispensing record names the manufacturer for every fill, which is why it is the first document to request.
Generic manufacturers are required by federal law to use the same labeling as the brand-name reference drug. Because they can't unilaterally strengthen a warning, the Supreme Court has held that state-law failure-to-warn claims against them are preempted — meaning they generally cannot be sued for inadequate warnings at all. A related decision extended similar reasoning to design defect claims against generics.
Brand-name manufacturers face no equivalent bar. They control their label, they're expected to update it as evidence accumulates, and failure-to-warn claims against them proceed normally.
So the threshold question is what was actually dispensed to you — and most patients don't know, because pharmacies substitute generics automatically in most states. Your pharmacy dispensing record answers it: it identifies the manufacturer and the NDC number for every fill.
This produces genuinely uncomfortable outcomes. Two people with identical injuries from the same molecule can have completely different legal positions based on which bottle they were handed. It's the current law, it's been criticized from the bench, and Congress hasn't changed it.
Second: causation
You have to establish two distinct things. General causation is that the drug is capable of causing this kind of injury in people — proven with epidemiology, studies, and expert testimony. Specific causation is that it caused yours, usually through a physician's differential analysis ruling in the drug and ruling out other explanations.
Both are contested hard, and both are expensive. This is the main reason drug cases are pursued in coordinated litigation: the general causation work is done once and benefits every claimant, which is not economically possible case by case.
What strengthens specific causation in an individual case: a temporal relationship between starting the drug and the injury, improvement after stopping it, recurrence on rechallenge if that happened, absence of other plausible causes, and the injury being one the drug is already associated with.
What to gather
All of this exists and you generally have a right to request it. A pharmacy or provider may charge a reasonable, cost-based copying fee, so ask for an estimate and whether an electronic copy is available.
- Complete pharmacy dispensing records for the entire period, showing manufacturer and NDC for every fill
- The prescribing physician's records, including why it was prescribed and what was discussed
- All medical records relating to the injury, including diagnostic testing
- Records for any pre-existing conditions, which the defense will obtain regardless
- Any remaining medication and its bottle
- Insurance and pharmacy benefit records, which independently document the fill history
- Your own timeline: when you started, dosage changes, when symptoms began, when you stopped
Report it to FDA
Adverse events can be reported directly by patients through FDA's MedWatch program. It's free and takes a few minutes.
It doesn't compensate you and it isn't a legal claim. What it does is contribute to the surveillance data that identifies safety signals — which is how label changes and withdrawals eventually happen. Reports from patients and physicians are the raw material of that system.
What tends to make a claim worth pursuing
None of these is a guarantee. They are the facts an attorney will look for first when deciding whether to take a case like yours.
- You have pharmacy records identifying the manufacturer
- You were dispensed the brand-name version
- The injury required hospitalization or caused lasting harm
- The injury is one the drug is documented to be associated with
- Symptoms began after starting the drug and improved after stopping
- The label was later strengthened, or the drug was later withdrawn
- There's existing coordinated litigation involving this drug and injury
Questions
The risk was listed on the label. Does that end it?
Not necessarily. The question is whether the warning was adequate — its prominence, its specificity, and whether it reflected what the manufacturer actually knew at the time. A risk buried in a long list, or described as rare when internal data suggested otherwise, can still support a claim.
How do I find out if I took the brand or the generic?
Your pharmacy dispensing record shows the manufacturer and NDC number for every fill. Request the complete history from every pharmacy you used. If you switched pharmacies or insurers over the years, request from each — people frequently received brand for part of the period and generic for another.
Should I stop taking it?
Talk to your prescriber, not a website. Stopping some medications abruptly is more dangerous than the risk you're worried about. This is a medical decision and it belongs with your doctor.
I saw a TV ad about this drug. Is that the same thing?
Those ads generally indicate existing coordinated litigation, which means the general causation work may already be underway — that's genuinely relevant. It doesn't tell you whether your individual case qualifies, and criteria in these litigations are often specific about injury type, timing, and documentation.
Read next
Other situations
My medication was recalled
Contamination claims sidestep the preemption problem entirely.
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An implant or device failed
How the FDA cleared the device usually decides whether you can sue at all.
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The pharmacy made an error
The most provable claim here. The error is documented and preemption doesn't apply.
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An OTC drug or supplement
Supplements are barely regulated pre-market. That cuts both ways.
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