The same logic applies when the plaintiff suffered harm from use of a drug or other product. In some instances, the plaintiff may not be able to determine which of several manufacturers produced the particular dose she received. In those situations, the plaintiff will need to invoke one of the special tort theories—concert of action, alternative liability, enterprise liability, or market share liability—that might overcome her inability to identify the product’s manufacturer.223 The availability of those theories should be irrelevant, however, when the plaintiff can identify the product’s manufacturer but nevertheless has claims against some other manufacturer who engaged in some other tortious conduct that was also a cause of the plaintiff’s injury. In other words, a manufacturer could be sued not because it made or might have made the product in question but because it was simply an additional tortfeasor liable for some form of wrongdoing other than making and selling the product the plaintiff received.