To show that a product is defective, the plaintiff must prove that it was unreasonably dangerous. A plaintiff can do that with the help of a local attorney by showing that a mistake was made when creating the dangerous drug, such as:
An error in the manufacturing process that tainted a particular batch of the drug
An error in design that made all batches of the drug dangerous to everyone, or to certain classes of people
Inadequate labelling that did not properly inform consumers of the risks of the drug, or failed to provide enough information to allow consumers to evaluate their individual risk
The plaintiff must prove that they used the drug in a way that the manufacturer could reasonably anticipate, which is different from requiring that the plaintiff use the drug in accordance with label directions. If it is reasonable to assume that a patient might use the drug in another way, by taking repeat doses more frequently than the label recommends, for example, a manufacturer could possibly be liable even if the patient did not follow package directions.